I had this sitting on my hard drive for a while, and since it doesn't alter gameplay in any way other than changing the loading screen I figure I would post it.
http://www.sendspace.com/file/mopmp6
This replaces the character selection/creation screen with de_dust from counterstrike.
Instructions: Delete or rename clz.eqg, clz.zon, basically anything related to the zone file clz.
Boot up EQ & you're done. Enjoy your counter-strikeness.
Will have screenshots soon.