I've set up multi-boot with Win98, WinXP Home, and RH 7.3. But I chickened out of letting GRUB set up on the MBR or boot partition, and just made a boot floppy. Can I now go in and manually set things ...

Here's what happened. Dual booting WinXP and RH8, everything worked great, until I booted up into XP's recovery console, did a fixmbr (meant to do it on a different drive with a different problem) on ...