The textures are located at: Data.pk2/Prim/Mtrl/itemoption
The color glows are not made into the textures, so you can easily change it to any color you want. Check out
this guide for more.
If you're planning to edit the textures, you'll need Drew's
PK2 Tools for extraction and injection, and Jan's
DDS/DDJ converter.
Have fun to whatever you're planning to do.
