It does not solve the exporting problem of 3DS Max, but you can also use the morphs in Vizard. For example:
Code:
female = viz.add('vcc_female.cfg')
print female.getMorphList()
female.setMorph(0,0.5)
The morph list should include your happy morph. If so, you can set it to a certain percentage. I don't know what you're trying to accomplish exactly, but in this way you could also use the happy morph in Vizard.