Description of problem:
There is no compat-libc* packages on FC5.
Some old (binary only) software still relies on libc5.
Simply copy a libc.so.5 binary doesn't work as it segfaults when being mmapped.
(I know it is a bit rough for a bug report, but it is really a problem. I've
seen some similar request on google, but no response. It seems like some other
distribs provides such packages --- mandrake does)
We have (intentionally) stopped providing those more than 6 years ago.
Providing support for 10+ years old software isn't Fedora Core's goal, you
are really on your own with such programs.
Guess you need to tweak SELinux policy to allow such programs in addition
to downloading RHL6.2 ld.so and libc5 packages (the last one that shipped them
for compatibility), they surely have executable stack, text relocations etc.