BR2000 :
Your IT department is MUCH different then you home user, both in the versions of the software and how they 'build images' (I worked both sides both consumers and business and there is MANY technical differences). That said, what they used what a 'wrapper' that probably was like the Linux Boot Manager hack that is NOT support by Tom's Hardware that is loaded first, so the wrapper is the BOOT Manager (MBR), then you install a OS through it's VERY technical steps, reboot then repeat for the second OS, (again very highly technical steps)_ and the LINUX BootMGR hands the BIOS asking "who is the OS" it pauses and askes you "Which F Key please".
That said you bring up a CRITICAL issue (as I pointed out above as well) XP is NOT supported by anyone, Not Microsoft, No one. Patches, fixes, drivers, etc. have stopped and many removed, all depending on the maker's policies. So IF you install XP it is HIGHLY susceptible to failure as it has no support mechnism to fix glitches, protect against security issues (ohh look he is running XP, let's take it over and reformat his drive on him WEEEEE!!!!) etc.
I called the maker of my motherboard (Gigabyte) I asked them about the dual boot of Win 7 & XP and mentioned what you had said about the MBR problems. They said it can be done fairly easy by even a home user, provided some steps in doing so, and provided links for additional information and tools.
(http://www.sevenforums.com/tutorials/8057-dual-boot-installation-windows-7-xp.html)
(http://www.boyans.net/DualBootRepair.html)
I believe you misunderstood what I said, I didn't say it couldn't be done but was pointing out the major differences between your 'previous experience' as compared to now 'on your own' steps you wish to do. Home users have done it before, but they are 'on their own', including the HIGH risks involved, which when
they happen they lose everything and have to start from scratch, which many techie enthusiasts are more then willing to accept. As your unfamiliar with this, I wanted to advise you of the risks, and know the COMMON outcomes many people have had, so you can decide which path would be best.
BR2000 :
As for XP no longer being supported / no more updates to fix glitches or security issues. I already know that all my current programs run just fine on XP and most new software is still being designed to run on XP, (1/3 of people still use XP) As for security issues, most likely I will not be using XP to connect to the internet. If I do, I have Bitdefender Total Security who guarantees that my XP operating system will be safe. If someone does hack it, no big deal as I will not be keeping anything important on it, that is what Win 7 is for.
Your mistaken here for a few reasons. First Bitdefender's revised Terms of Service (which you can access via their website legal page) won't "guarantees that my XP operating system will be safe", that is a legal liability they won't guarantee especially on 'unsupported and outdated OSes'. They as well as all software makers have done this routine before, and they all either A) End of Life on a version of software - aka we don't support it if you use it it is YOUR problem not ours B) revise the ToS on it and explicitly 'advise' to ensure 100% compatibility and 'as advertised' you need to use the 'minimum requirements' which lists the supported OSes.
That said, your number is inclusive of the worldwide count of systems, but NO people are not making new software designed to run on XP, for a couple good reasons. First, if they do make it, Microsoft forbids (i.e. want our lawyers to sue you out of business) the inclusion of their Logo (trademark) unless they meet Microsoft Certified standards, which states NO UNSUPPORTED OSes. So they will only code (which is MAJORILY different) for Windows 7/8 then for XP (there is a large library of security differences on how to code in 7/8 as compared XP which used elevated permissions and other backdoors locked down in Vista to 8, so you can't code the same way).
BR2000 :
As I said before, you can run ANY XP software UNLESS we are talking (like at Lucent) specific apps that made specialized hardware direct calls (i.e. like the old Analog Telco equipment) either normally or via COMPATIBILITY mode. IF you have a real desire for a XP OS, then I highly suggest just a VM of it is both the easiest method, best way to ensure no conflicts, and easily recoverable (Shut off the VM, reload VM and Image, back to where you were using it 10 min ago)
An XP (VM) is not an option because a (VM) does not have access to the video card. Absolutely nothing that I already own runs on Win 7. Not (Nero 7 or 8, Powerdvd 5, Audio mixing software, Photo scanner software, Printer software, Paintshop Pro, Adobe photo elements, etc. Sure, I could spend a $1000.00 on software upgrades, but for me it's not an upgrade if they did away with the features that I need. ( If you know of any video playback software that has down to 1/8 speed slow motion (and maintains slow motion after an AB Repeat loop ends and restarts from point A again, and a zoom feature that lets you use the cursor to draw a box around the part that you wish to zoom in on.....please, let me know. Win 7 will not even let me roll back to an earlier Nvidia driver so that I can use the classic control panel when I choose to. The rollback button is greyed out, not active. Shit! I can't even disable the the locked taskbar to be able to pull windows down and over it. Someone even came out with a patch to fix it, but of course microsoft was quick to create an update to wipe out that patch......Sc___bags. Win 7 is just not user friendly it wants to control everything.
We are now entering Windows 8.1.1 now, Hard Drives use a file saving format of 4K and work in a vertical platter read method then horizontal, BIOS is dead UEFI now loads the 'hardware' first, and so on are significant changes on the hardware alone that make it incompatible with anything prior to Windows 7 SP1 (can't load UEFI , pre W7SP1 can't read the file format or understand how the HDD workd, etc.).
Adobe has many current applications that you can purchase right on their website, Windows 7 / 8 comes with 'burning' built in, there is no need for Nero nor even PowerDVD (as Windows can play any video) when VLC is free and small and plays any file format. There is plenty of free Audio mixing software, like Audacity, which is current and FREE, there is no need for 'printer software' as all application INCLUDE the printing functionality already built in, and everyone has Microsoft Office which most make things in Word then print it, or use Publish to do banners and other things if they can't 'search' via Word's built in (and connected online) templates for the same thing. Windows 7-8 natively can scan in any scanner, AND there is plenty of 'updates' on the scanner maker's website that can provide for it, if you need to. PSP or Photoshop (the main one people use) is again readily purchasable on their website and installed instantly, etc.
Your specific functions for videos is under the terms normally for video editing, as all players have a function for 'slow down' (check again VLC) which can slow the video down to any speed you like. As for a AB Loop, normally that is in Video Editing based software, where your segmenting the video down to a section and slowing the speed then looping that video segment. There is plenty of free software, almost all are hosted on SourceFourge.com and can be quickly google (here was a old article which googling the names of the software brought up the current websites http://www.computershopper.com/feature/the-best-free-software-video-and-audio-editing). Zoom functions are accessible with Magnify (built again into Window 7 /8) in realtime on your screen or a segment of the screen (click VIEWS and select LENS).
Basically everything your stating has a alternative or upgrade (not update) that is free or you would spend money for a proper (like Adobe's) professionally made software. All the software you listed is 'common' Bloatware included with the PC when purchased, and I am sure if you bought a off the shelf PC they would have it.
Honestly, everything I just got through saying is simple answers on changing you, the user, perspective or pattern on doing things. As I read this part several times, and from what I read on what your saying here, you are absolutely adamant to be on XP, the way XP was, with the software that worked with XP, and that is it. As you seem set on that, I can provide you all this information for you to see there is options, I do not believe that will work as your solution.
Your only option, honestly and sincerely, will be just keep your old machine set to one side you wish to keep as it's legacy design, performance, and etc. and hope it just doesn't belly up one day (parts are only guaranteed for 3 years from time of purchase based on a 40 hour weekly usage, after that the parts are known to 'wear out', break, defect, etc.) and you will be forced to just toss the entire thing in the trash or pay VERY HIGH for other people's used parts with no guarantee how long it will 'keep limping along'. You will then be forced at that time to either change, or be pissed off because it isn't "like it used to be" and just have to deal with it.
I believe the best solution path is just suck it up, and accept things changed, you will need to change, and shift with the new way things are done now, rather then when you have 'no choice' and are impacted much more dramatically (what do you mean they dont' sell those drives even on Ebay? How am I going to load XP then??).