Scott,
Contrary to the post dates on this thread, this thread is actually much, much older than 2008. After a forum software switch all old threads and posts had to be manually copied and pasted into new threads, there was an announcement about it at the time as it was the only way all the SCF members' hard work and contributions could be preserved after the switch.
The Progecad version I was using at the time (prob 2005 or earlier) was clunky, the UI was very slow to respond to mouse movements (well, by slow I mean fractions of seconds) and support was definitely lacking (I seem to remember some of the help files were only in Italian and I'm not sure I ever got a reply from tech support regarding a problem I was having). I was running it on an HP zd7000, Intel Pentium 4 (2.66 GHz); 1.5Gb RAM, Nvidia FX Go5600 so I've no idea why there should be any problems.
Nevertheless, I did download a more recent version of Progecad about a year or so ago and found it's performance and UI was greatly improved, certainly putting it on par with Autocad (and especially if Progecad avoid the bloatware nightmare and Vista style tabbed interface that Autodesk have created) I'd say Progecad was a much better product for a much lower price.... no fibbing! π
Regards,