You can have a OACS 3.2 and OACS 4.5 running on the same machine (same PG 7.1, same Aolserver). I used to have it that way until 4.5 became more stable. I did not have to bother converting stuff form one of the other, so that made my life easier.
BTW, which are the packages left to port that you feel are most needed?
