Need some help, cannot enter BIOS with keyboard.

Hello all, I finally got the parts for my first ever computer build. Put it together in about two hours (I got the front panel right on my first try, my kung-foo is strong) But anyways.
First things first, my spec's.

(TL;DR at the bottom if you want to skip all this)

GIGABYTE GA-EP45-UD3P P45 775 mobo

Intel Core2duo E7400 (will be overclocking later on when i get a new HSF)

4gig Mushkin RAM (2x2)

500gig Western Digital HDD (7200 RPM)

Sapphire ATI Radeon 4870 512MB

Coolermaster HAF 932 case.

PC+P 750w PSU

Here's my situation, I start it up for the first time, with my Windows Vista Business (64bit) DVD, it loads into the setup. I get free Microsoft software from school, so all i did was burn it off the MSDN website and bur a DVD. So the setup asks for the Serial Number and all that stuff, it loads the files, begins to unpack. Sits at 0% for about five minutes, then Pops up with a "0x80070017" Error. So i take the disk out, and burn a new one assuming that was the problem.

Start the system up, put the disk in, and now all i get is a "BOOTMGR is missing, Press CTRL+ALT+DEL to restart" I havn't entered the BIOS yet, and the hard drive is the main boot source.

That isn't quite the problem though. I've had to do this with my laptop before, and i'ts a pretty simple fix.

My problem is, I don't have a PS/2 keyboard! I'm pretty sure USB keyboards have to be enabled in the BIOS menu so they will work, but the keyboard i have is USB. I have a USB-PS/2 adapter, but it doesn't do anything. I can't press the backspace to enter the bios menu, or do basically aything.

THe one odd thing is, it will let me press F12 and enter the boot list, but i cannot arrow up or down. Now i just searched all over town (best buy, officemax, etc) and cannot find a keyboard that uses PS/2 to save my life.

So here is a TL;DR

Problem 1: Cannot enter BIOS with my keyboard, so I cannot change the boot priority.

Problem 2: For some reason, i get "Error 0x80070017" every time i used my vista disk.

Any help is GREATLY appreciated.