For the sake of nostalgia I made a "Start a Match" feature set with Quake 3 weapon and movement defaults. The shotgun value is slightly incorrect. It's not possible to change the number of shotgun pellets or alter the pattern, so I just made total damage the same. Battlesuit was left unaltered as I don't know the Q3 settings. If someone provides these, or other corrections, I'll edit.

Just paste into the "Import Settings" option of the "Start a Match" tab.

http://pastebin.com/gUPfuFm3

{"maps":[],"cvars":{"premium":0,"g_allowKill":1,"pmove_AirSteps":0,"pmove_StepJump":0,"g_damage_mg":7,"g_velocity_rl":900,"g_splashdamage_rl":100,"g_knockback_rl_self":1,"g_knockback_gl":1,"g_knockback_rl":1,"g_damage_lg":8,"g_knockback_lg":1,"g_damage_rg":100,"g_knockback_rg":1,"g_knockback_pg_self":1,"g_knockback_pg":1,"g_velocity_pg":1800,"g_splashdamage_pg":14,"g_splashradius_bfg":120,"g_velocity_bfg":2000,"weapon_reload_bfg":200,"sv_warmupReadyPercentage":0.51,"g_knockback_cripple":1,"g_damage_sg":6}}