You can use any skin texture designed for your character that you want as long as they're not for resale.

For example, you can put any of the Pureskins on any V4 character using the supplied mat poses and you should be okay.

If you want to customize V4 (add morphs) you'll need to either purchase the character/texture package (i.e. Freya's Blanchette) or design your own, something I don't know how to do in Studio.  I use Poser to morph my characters when I create a character/texture package.

Hugz from Phoenix, USA

Victoria

Remember, sometimes the dragon wins. Correction: MOST times.