Amapi v4.2 is free there is a link from the amapi forum here at renderosity. newer versions of Amapi you can find on ebay for $50 (legal versions, not warez). Funky learning curve but hey it's free, and pretty powerful. I toyed with it for a while, but then jumped into Lightwave 7.5 when I had the cash so I don't even use Amapi anymore. There are also some tuts on creating clothes in amapi for poser. my 2 cents.