Getting the billion little things all straightened out can be very frustrating. If your goal is a working OACS, and you're willing to walk away from your partial work (and your committment to the newest release of everything), try http://aufrecht.org/openacs-4.5-quick-guide
, the "Instant Gratification Install." I wrote it because I was tired of running into problems like yours. It should take you 2-3 hours to have a working OACS server.