can anyone tell me if there's a problem with setting up a box to boot to more
than one version of Linux?

I have a PC booting to Win/98 and SuSE Linux 8.2, and now need RH Linux 7.3. I
have about 30Gb free, so can create more partitions...

Has anyone done this or anything similar? A piece of cake? What problems can
I expect?

Thanks in advance for any comments or advice,