I want to buy this model and use it in Crazy Talk 8:
http://www.cgriver.com/axyz-design/11266-casual-attire-man-cman203m4cs.html

How can I achieve that?

You can not use 3D Models in CT8.  You can only transfer  a Image (from a front and side  face)  on the CT8 3D Meshead.

Iclone is a better  choise if you want import and animate rigged 3D Modells , but it must be in FBX File Format  and you need 3D xchange as well. 


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Thanks for your prompt reply! I will look into it.