Since he hasn't responded to you yet Eiii I have a feeling he doesn't get anything of what you and D!NGO said, even though it's the right info.
You get into C:\Games\Paintball2\pball\configs (I think) and then you go to the 's' section of the configs and click on server.cfg and type CTRL+C, then CTRL+V. You will get something called like... server(2).cfg, which is right so far. Right click on server(2).cfg and click 'Rename' and name it myserver, and your done.