I DLed the demo version of HeroLab, and it certainly looks promising. :) The proof will be if I can figure out how to get my homebrew Captain class, the 3.5 Duskblade, and the 3.0 Kensai in there.
So the next question: do you have a similar recommendation for a monster generator? I see that the PfSRD has a nifty fan-made monster advancer, but dang it, I just gotta have my fiendish vampiric troll sorcerer/blackguard*!
*Actually, I don't gotta have one of these. But you get the idea!
EDIT: I see also that the monster advancer is a bit on the buggy side.