I finally got QPHAB 2006 working on Suse 10.1. I first installed wine and had no luck getting it to install anything. I removed it and installed cxpro 4.2 and had issues with it not being able to translate "c:\" to a Unix path. I think this is related to ulimit. I removed cxpro 4.2 and reinstalled it, removed the .cxoffice directory and then upgraded it to cxpro 5.0.1. I installed QPHAB with no problem.
I then ran it from the command line since none of the menu or desktop icons are responding to any clicks.
It works.
Unfortunately, I don't have a Fedora Core 5 machine any longer to test it out. If I can get one, I will try installing it again and see if it works. I'm still not sure if it works this time b/c I'm using Suse 10.1 instead of 10.0 which failed, or if it is something else quirky that I did.