Well, before I installed mac os X final release, I had to wipe my drive. Before I wiped it, I copied some stuff off it, such as the usuall linux command line utilities (bash, ls, top, netstat, cat, pico , etc). None of them will execute in X from the command line. I get something like : incompatable binary
Of course, my linux distro was Yellow Dog Linux (www.yellowdoglinux.com, I think). So maby yours will be different. And, srpm's are another story.
But to answer your question, I don't know how to open an rom file in osx, maby if you could compile the rpm utility... yeah right!