1.Download imgtool
2.After downloading go open it and go to top right hand corner and you should see "file" and open it
3.Go to your gta sa directory then click models
4.Double click player.img
5.Press F2 in your keyboard
6.Search for "10ls3.txd"
7.Right click it
8.Click replace
9.Go to your wanted texture then Double click
10.Open Gta SA and enjoy

BY GARED DO NOT COPY OR I WILL PUNCH U