Okay, I bought the Russel texture from the marketplace and applied it to David who uses the exact same UV's and texture set as M3. I messed around with the nipple/areola morphs and when i render it the texture is stretching past where it should be, any ideas on why its doing this or how to fix it? (see picture)

If I recall correctly, DAZ shifted UV coords for the different Unimesh-derived characters in a couple of places, one of them being the nipples, others being the lips and navel, such that it's not precisely true that textures for Unimesh-derived characters are 100% perfectly interchangeable (without some tweaking.) If someone knows for sure that I'm wrong about this please feel free to correct me. You said you'd already tried working with the areola morphs, but if you can make the auriole larger to roughly match up with the texture, that might help. I'm pretty sure that what you're seeing isn't that the texture is stretching, if you have M3 you can test that. I think I've seen this same thing before when using M3 textures on David. Best of luck with finding a fix!

Congratulations, you found the problem that makes Fyre scream every time there's a new unimesh released. Leave the darn mapping alone already! Jeesh! A few disgruntled customers could get DAZ in so much trouble for false advertising. Despite what the product pages claim, these figures are NOT 100% texture compatible. Unfortunately, I don't think the areola morphs will help, because the texture will move with the polygons. If what you're working on will look OK, you might try the morphs to flatten the nipple.

I think I found the problem, i overlayed the russel texture with both the David and M3 texture in photoshop and turned down the opacity so i could see all three, and i noticed the russel nipples are slightly larger then M3/David, also the center of the Russel nipple isnt centered with the David/M3 nipple. This would explain why its stretching beyond where it should, i tried correcting it in photoshop but im not the best with that program. I tried sending a message to the artist hopefully they will respond. :)