I found the sollution!

There are 2 sollutions in fact.

First use the pictures of vincebagna changing the mc6 file, I changed this time figure 1 in prop Handbag_1 (That is also the name in de pose tab).

and

when when the prop is not alone in the scene but I put a figure 1 first in the scene, you can change the texture and apply  the new pz2 file.

(It helped to look at the files of a free V4 hat wich had several textures I couldnt apply either).

Thanks