heh
lol sorry i was in a bad mood some noobs kicked my ass in cs so i got pissed off ;/
sorry anyway
just download a model
rename the old1's 3 last letters , lets say u wanna replace a regular vegeta
write instead of the original 1 : vegeta.dll
and than put in that directory the skin u downloaded , or if ure sure there is a skin that u really want than just replace it with the regular one with no backup