[Johnny got his gun]

HL engine uses numbers to define teams. You can have almost as many teams as you want in your mod; TFC normally uses 2 or 4, HL Team Deathmatch can use any (?) number and CS uses 1 (t) and 2 (ct), as well as 3 (spectator).
There is no need changing that; it can't even be changed. Even if we wanted you can't return teams in a form like "ct" (strings).

Btw TEAM_T & TEAM_CT are not defined by cstrike.inc?