thanks a lot.
> I don't have OpenACS installed at the moment
There is a very, very quick option for this. Just download the "Vlassis" installer and you'll have OpenACS running (on Cygwin PostgreSQL 7.3) within 3 minutes. Impressive really.
In order to test your distro, you would only have to replace Vlassis' "nsd4" subdirectory by your distro, and there you go. I imagine that testing in a final system is going to be much quicker and will produce less errors then with a partial configuration...
Btw., I've got OpenACS and Project/Open running with PostgreSQL 8.0 beta 3 on my Win2k box, and I haven't had a single problem, not with the install nor with the operations (there were some problems with beta-1 and beta-2 though). Jeff actually made some changes to HEAD during 5.1.1 for PG 8.0, so these changes should be in 5.1.2 now. So you actually might start to go ahead.