Please help....

I have two 2 computers and 1 pendrive. Both the computer have windows installed on it. And I installed RHEL 5 on my pen drive using the first computer, so On my Grub the first option is Windows and second option is Linux(Pen Drive) When i take my pen drive to the second computer it doesnt show me my RHEL option while booting up. I know thats because boot loader goes to the nt boot loader not grub. Now on my second computer can i configure my boot loader to take the boot from harddisk and when i insert the pen drive and select the linux option i should be able to boot from pen drive.


Please suggest how that can be done...

If possible i also want that on my second computer i want to use lilo instead of grub with first option with window and second option RHEL (Pen Drive)