Hi,
I'm new to MAX character work, but have had success using Biped, Physique, and imported .bip files for creating motion scripts. Using Motion Flow, I bring several .bip files into the Clips in the Graph, connected with Transitions. I use Clip Mode to adjust the transitions to match, especially the Z height, since my animation includes climbing stairs.
I even saved out both the Script and .mfe files so as to not lose the setup. Then I can use the