I recently added a tattoo to a texture, and I'm not texture artist. I've tried texturing but after 3 weeks of trial and error to get a belt, dress straps etc to line up on a dress, I gave up and decided to just buy from other people.

What I did was:

1. Locate the body texture in the textures folder that I want to alter. Make a copy of the texture and save it elsewhere.

2. Open up the body texture into my graphic program (paint shop pro). 

3. Place the tatoo on the body part where I wanted it. 

4. Save the file back to the original location.

 

There are also several links the the "Material Nodes and Bookmarks" thread that is stuck at the top of this forum.

 

http://www.superheroinecentral.com/mrx/xpage/decaltutorial/decaltutorial.htm

http://www.renderosity.com/mod/tutorial/index.php?tutorial_id=518
http://www.renderosity.com/mod/forumpro/showthread.php?thread_id=2313758

"It is good to see ourselves as others see us. Try as we may, we are never
able to know ourselves fully as we are, especially the evil side of us.
This we can do only if we are not angry with our critics but will take in good
heart whatever they might have to say." - Ghandi