Say plz how to make green enemy skin with black countour? like this

if I understand correctly, you want (always) "only" the border of the player?
you can't do this by editing just the skins images...

I think this is the only way:
http://www.quakeworld.nu/forum/topic/5615/player-outlines

(you have to download the Nightly Build version of ezQuake)
http://uttergrottan.localghost.net/ezquake/dev/nightlybuilds/win32/2012-04-21-fca5390-ezquake.7z

and activate this command:
r_outline 1

[I also changed this command: r_outline_width 1 (instead of 2), to be nice with far distances]

thanks.
in current nightly build of ezquake it called gl_outline