I would just use a utility to extract the embedded geometry if I were you (if you plan on distribution), I personally do that kind of stuff in a text editor and am pretty familiar with .obj editing but many find just using a utility a lot easier, fast.

http://www.cocs.com/poser/props2.htm

That's a tutorial that lays out specifics if you're adventurous. There's a bunch of utilities, just google 'embedded geometry poser'.

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