As said before: Keanu Reeves (aka Neo) in a important role! (Crazy scientist judging by the hair!) ... Anyway, Tommy Lee Jones as the G-man definitly sounds like a good idea!
Yes you can. The Boot-record is saved on your primary HD and just redirects to another HD if the OS is located there ... Windows 2000 and XP even use the same boot-loader, so messing it up is quite hard!
Are you installing from the HD or from a CD? ... Either way it sounds like the file i corrupted. If you're isntalling from a CD the its properly because of scratches.