Actually you can give your map the same name as the original one, since the actual BSP data doesn't change... what changes is only the entity list, which is sent by the server to all clients, so your clients won't need to download the new map if they have the original one (since they will inherit from the entities the server sends them)
Austin, how come your lovely proggy isn't in the filebase yet ? would you want to upload it there ASAP man, quiquiquick
