Why not use the naming conventions bis use themselves? Eg name_of_map.island.pbo for singleplayer, like 07shadowkiller.abel.pbo and #players_type_name.island.pbo for multiplayer with type being (c|ctf|d|dm|t), like 1-4_C_SHADOWKILLER.ABEL.PBO, 1-8_D_FlagFight.ABEL.pbo, 2-8_T_CaptureTheFlag1.EDEN.pbo...
I would also suggest you put a (t|s|ts, for time limit, score limit or both) between the name and the island if the map needs parameters for a dedicated server. It can be #### of a lot work for an admin to find that in the hundreds of maps. So for example
2-8_DM_newscenario_ts.cain.pbo for a team deathmatch map with time and score limit.
(Edited by benu at 11:41 pm on Nov. 5, 2001)