Have you tried Masa's "Gordian Knot" program? It exports in obj format, the string accepts common textures and works well with Poser. Simply export a "core prop" from Poser as an OBJ, load it into Gordian Knot, wrap it up and export the string back into Poser.

Here's the link:

http://www.eurus.dti.ne.jp/~masasi/index.htm

I'd rather stay in my lane than lay in my stain!