Aang tattoo solutions

[bagira_shadow]

:help: I'm very new to the modding and creating anything (some say I have not a single creative bone in the body), but I want to make a sim to look like Aang from Avatar, Last Airbender. Unfortunately, those small numbers of sims-Aang-look-a-likes either do not have tattoo, or have tattoo just on the face. I read a bit of tutorials and found two ways to solve a problem.
1) to make arrows as tattoos and attempt to use mods to make them full body
2) to make a skin overlay, like I've seen in some alien sims, and just draw tattoos on the body

Question..... How do you make overlay? I saw tutorial on skin, but not on overlay.
Question 2.... did someone already did something similar and are willing to share result? Just so I would spare everyone the horror of dealing with complete noob.....

[CmarNYC]

I think you mean an accessory that overlays a texture on the sim - like the gloves, which can overlay the whole body. Here's a tutorial on texturing that uses a body tattoo as an example: http://simswiki.info/wiki.php?title=Sims_3:Creating_A_New_Base_Texture

For your purpose, making a custom skin is also a possibility.