嗯，不错，但忘了一步。：）

/boot/grub/menu.lst or grub.conf needs to be modified to include boot options for the XP and RHEL.

You can also use NTLDR to load your system. The grub img needs to be in C:\\ and boot.ini should include an section to boot rhel.

You could also re-install RHEL after XP and write grub in the MBR at the end of installation. It should take care of the XP installation by default. (It SHOULD, but I don't use RedHat , so, ...:))

BTW, use 9GB as the swap is a waste. You know that, don't you? :p