ndkid :
Thank you for your response, I will be installing on a new hdd, and it will definately be the Dell pro windows 7. My concerns are whether the system would work better on the 64 bit version or 32 bit version, considering also, that I would like to restore and keep the oringnal window xp media center version on the present hdd. I did an experimental run with window 64 bit and encountered some issues with updates while both os systems were active and what I would call software conflicts. I am seeking any information that would help with my decision and set up. I have done some research and have recognized that there my be a slight issue with the raid driver regarding the q6600 and the current xps 410 mother board. This was a cpu upgrade from a duo core.
The way to do this is to install Win6 64-bit (Pro or Ultimate version). Then utilize the built-in capability of 'XP-Mode' (Virtual PC) for your older XP applications.
This is what I have done and works fine. I use Win7 for Office 2010, and other apps. - I use XP-Mode for an older Autocad version, and a Project Management software (more capabilities) that I prefer over MS Project.
There is no need to install XP on a separate disk; use the built-in feature of 'XP-Mode' in Win7 Pro. And, go for the 64-bit install.
Remember, when you use XP-Mode, it is like a separate XP computer within the Win7 computer. This means that you must have a separate anti-virus program for the XP-Mode Virtual computer, along with a separate anti-virus for the Win7 computer.
I use motherboard RAID and I have set up RAID 1 for my data (RAID is not a substitute for backup). Don't buy a separate RAID card; use on-board RAID.
The XP Media version has too many reported problems and I do not suggest that you mix it with Win7. If you can install it on a separate disk and run it while the Win7 OS is not running, you may have success.
Whatever you decide, perform regular, frequent backups on an external disk.