Find the stable release of whatever OS runs your preffered software on the required hardware platform and leave it alone unless grubby users interfere with it. I am knee deep in a similar situation but with Sun Software, Hardware and Solaris 8. Got here after all the parts were here and they couldnt get it to run. One release back of the software, 32 bit kernel as opposed to 64 and a dam good kicking if I ever find the developer (who is in france) who claimed the release was GA.
thanx,
bill