Hopefully, you made a boot disk. Put it in the floppy drive and use it to start Linux. In Linux, open a terminal window and change to root:
Then try reinstalling GRUB:
Reboot the computer. It should work now. If it doesn't, here is the link to a GRUB manual:
If that still doesn't work, give LILO a try. On Red Hat's website, they have the manuals for RH9. Here is the link to the installation one:
As for moving the drives around and changing the master/slave relationship, be careful. Both Linux and Windows set themselves up in relationship to the drive designations at the time. Changing them causes them to not work. Linux can be manually corrected and made to work, but Windows cannot. It will have to be reinstalled.
As I said, I would not move the drives around. You have a minor problem with GRUB Stage I not finding Stage II (the manual will explain this). Much easier to just work this out.