Mutilple OS problem (booting on Windows XP)

I have a question…I have 2 hard disk drive C: and F: On the Drive C: I have Windows XP as my OS while on drive F: I have windows 2000. Just last week I had a problem of booting up to my drive C: because my brother accidentally unplugged my UPS…what should I do in order to make my drive C: to its normal state? I cant boot up to drive F: because the screen shows that I have a problem in booting up? and also another problem is I don’t have any windows installer with me and any backup disk

The only thing that comes to mind is booting to the XP cd to perform a repair. Without the cd it's a little trickier. You should be able to find the correct Windows boot disk at www.bootdisk.com.

What error messages come up?