Agamon
Adventurer
The elite/solo monster changes work just fine. I've only used them (or a variation thereof) once or twice but they work fine for me. I house ruled starting HP for my PC's based on the Pathfinder RPG Beta (1st level PC's get full HD + Con Score for HP) it helps them stay up longer but dont think that they cant or wont get brought to unconsciousness.
Re: HeroLab. Yeah that would be cool, but HeroLab is pretty awesome anyway isnt it?
Having played both 4e and HackMaster Basic, I know those extra starting HP are just extra buffer...

HL is pretty awesome, agreed. Changing the way it handles iterative attacks could be beyond me, though. I'll have to go to their boards and see, I think.