It's in fact very simple to build a bsp file. All you have to do is go to the _bsp_ menu and select one of the build options. Then go for a cup of coffee or watch some TV until your map has compiled to a bsp file because it can take a long time to compile large levels.
The second step is to start quake3.exe, toggle down the console, type "\sv_pure 0" then hit enter.
3th step is to load the map. This is achieved by typing (in the console) \map xxx, where xxx is the name of your map.
That's all.

[This message has been edited by Chappa (edited December 29, 1999).]

thanks... bye blacksun

Thanks...

bye blacksun

btw, I think bsp files are stored in the \quake3\baseq3\maps subdirectory under the same filename except for the filename extension (the stuff after the dot) which is now .bsp