try what i will say and contact me back .
first boot in your redhat
type ( df -k ) cpmmand to know on which drive the /boot is mounted
say you found it /dev/sdb1
then type ( dd bs=512 count=1 if=/dev/sdb1 of=/win2k )
next mount your floppy disk , take the file win2k on a floppy
then reboot in your xp
copy the file win2k on the c
open the file boot.ini , hidden file , with notepad
add this line (( c:\win2k="linux" ))
then reboot with 2 disks on
it is assumed that you will find the linux option
try it , may it work .