maybe this file doesn´t work for all short3d models because its possible that some of them has another uv mapping, but if you import your texture over the files which textures matches ok with this model you aren´t going to have any problem.
here is the videotutorial:
http://www.youtube.com/watch?v=xmnhXtCyw7U
And here the files to edit short and jerseys in 3d in phtoshop:
http://nba-live.com/jaosming/jor1980/Sh ... l_0001.rar
