There is a way to do the model in Maya and then finish the process in 3dsmax, no big deal at all. But here´s what I would like to try, and I need a Maya user to do it. If you have Maya 4 or up there´s a dotXSI exchange plugin for it at www.softimage.com.
It´s a beta stages, but it would be cool to see if the plugin is good enough to make the models completely on Maya, then export them to .xsi and compile them with carcass.
Pls, register on my forums and I we´ll get to the bottom of this (the link for it is on signature).