RHEL and Windows simultaneously?

[scott at MIT.EDU (Scott Ehrlich)]

I currently have my system booting Windows XP installed on a 40 Gig IDE 
drive.  I'm going to add an 80 Gig IDE drive to the system, and plan to 
RHEL on it.   I'd ultimately like to make RH the primary OS and be able to 
boot the existing installation of XP in a window within RH (not 
dual-boot).

I presume there is a program within RH or the Linux world to permit this?

I initially thought of VMWare, but that is a self-contained 
software computer.

What are my options?

Thanks.

Scott