If you have texture convertor, easiest way to make tattoo is to make it first to v2 or M2 use just tattoo in that place of the map with solid fill background you can remove later, just convert it to V3 or M3 bring it back to your PS and remove that solid fill of the background, just move this tattoo layer to your base texture, reduce opacity and turn layer mode to multiple and reduce opacity as pleased ;) it has worked great in my work.

"Windows 7 crashed.
I am the Blue Screen of Death.
No one hears your screams."