Ok nevsehir , I'm sorry but I can't understand what you're doing, maybe it's a language problem (I'm not of an english native language and neither you), so this is what I've understood:
-You made a completely new model giving her the same shape of
Posette and called her
Posette
-You're trying to Uvmap her in order to accept V4 textures
if it's like that the result is not a
Posette, it's not "Canon", she wouldn't be different from morphing a V4 or V5 or something else in order to make it look like a
Posette, the process would be even easier
Or:
You started with a standard
Posette (P4woman) because you said that the meshes are the same, so essentially you created a set of morphs, in this case she is a
Posette with the shape you like.
In this case, if you remap it to accept V4 textures, consider to do the work on the standard P4woman obj, then apply the morphs, the final result will be more useful: if the meshes are the same, the morphs should be accepted, but the result of a shape or movement morph applied on an already modified mesh is unpredictable.
If I understood it, you're doing two things at the same time, or you already made a modified mesh for a
Posette) essentially a set of morphs and now you passed to a radical remapping.
As I told you, take it as a game, or, if you need help, just ask exactly what kind of help you need (for example "help me remapping the limbs"). Please don't feel offended by the low enthusiasm on a
Posette clone, after many years a lot of us have become "zealots" (conservative) about Posettes.
There is a message in the forum (somewhere) of some years ago, the topic was about the little differences between the models, by now it still doesn't exist a really new technology in the 3D arena: models are still made by polygons, with enough skill an artist can do the same things with a
Posette or with a V-something , the rest is only a matter of easiness.
Essentially, the so called "new models" are simply heavier objects made with more polygons, it's not that they made a model using "circles" instead of polygons, they are still the same thing. someone of us make a point in adapting dresses and accessories to our Posettes so that she can be always up to date. It works because the technology has not evolved enough, and here also comes the fact that a site like this little one is still actual: they say that
Posette is outdated but for me it's only words dictated in order to push people at the marketplace to buy the umpteenth "new" girl in town...
About the converters, none of them are for free, the same V5 that you are talking about is a commercial model while this site is dedicated, by statute, only to discussion involving free utilities and models. That's what we like , everything for free