Reimaging Without Access To External Media?

[BazookaJoe]

I've been wondering if anyone knows a way to reload a PC without using a CD or floppy? What i'd like to do is set up my PCs with boot menu or partition that can be called up at POST using a function key, then launches a very simple routine (something like Bart's boot disk, a simple command line w/ network support) allowing me to reload my PC with an image from a data repository on my network without using a boot CD or floppy. Any thoughts on how to do this?

[enuffsaid]

If your PC's support PXE booting, you might want to consider RIS.