Also, just a little additional info:
I have Win XP and Win Vista running on partitions 1 and 2 of a SATA drive
When I installed RHEL, I created 4 additional partitions on that drive (/boot, /, swap, and /data)
/boot is on the 3rd partition.
Hope this info helps. I purposely chose not to install a bootloader, thinking EasyBCD would do everything. But, maybe I did need the bootloader installed?