When people made player models for Q2, they included all colors used in the game so on CTF/TDM games the model, no matter what the model was of, would have it's team colors IE: yellow, red, blue, purple.
Also, keep in mind this idea is in no way meant to down the current player models of DP.
It is simply to add something new to the game and give users another option of how they would like to play...
Hence servers that allow people to display their creative custom skins/models and regular servers that use only the standard models.
Also, remember that if you don't have the skin that someone else in the game is using then you would see the standard model... In Q2 it was the GRUNT. So there would need to be a place to upload skins which brings me to another thought.
We also need a place where people can login into a site and upload maps or player skins, have them reviewed and others could have the ability to login to the site and download these items.
Dang I'm brainstorming today!!