For those of you having problem booting vista, try hitting F8 and going to disable driver signature.

If this works, go to start and type in CMD right click on the CMD at the top search and run as administrator.

You should now see a black box with white writings.

If not, try going back the start and entering in CMD again.
If it does work.
Type in:
Bcdedit.exe /set TESTSIGNING ON
Bcdedit.exe -set loadoptions DDISABLE_INTEGRITY_CHECKS

Hit the enter key.

This will allow you to boot without having to press F8 all the time.

~Joshua