Cool, thanks for the recommendation. Just been reading about it from the developer's website:
http://www.njsoftware.com/ipbg.html.
For the hint/tutor mode, does it rank all possible moves / cube decisions and show equities, winning/gammon/bg probabilities etc by move, or only show you the best move? (When I'm practicing I prefer to find out immediately whether I made the right move, rather than in a later analysis.)