If you're using Poser to save the files in Poser's libraries, then AFAIK, no.

Cheers,
Diolma

PS: And anyway, why worry? without the .png files you'll just get the "shrugging man" for each file - and they're only 91x91 pixels in size (a maximum total of 8281 32-bit words, plus a few for book-keeping - and that assumes that every pixel differs) Unless you're REALLY hard up for disk space, that shouldn't matter....

PPS: Sorry if the above sounds sarcastic - I didn't intend it that way, but sometimes people forget that most everything saved to disc these days takes up very little space (in percentage terms). Vidoes excluded!