I have Maya 6.5 and just downloaded a program called deep exploration thats supposed to be able to convert it. But of course, with everything I download theres a problem and I havent gotten it to convert yet. I'll have to mess around with stuff for a few hours but it should work.
Ok way off topic but what I'm saying is if you could somehow get your hands on a full version of maya, deep exploration looks like the only way to go. But Alias is crazy w/ their PLE there is no way you'll make anything good out of it. (I hate their watermarks so much)
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