I have installed BackTrack 4 Pre Final on HDD with enough space blah blah blah.

The thing is, I dont want to go on Windows, but my Partner needs it, since he doesnt work well with Linux.

Can I install Windows (it will overwrite GRUB), then run a live CD and fix GRUB ?

I have already 20gb/40gb taken cause I installed most tools I use on BT4PF.

Searched for the GRUB Installer for Windows, but editing ini files aint my thing.