QUAKE LEVELS (BSP's)  

New this month are QUAKE levels (also knows as BSP's). 

You have to follow a few simple steps to load these new levels.

STEP 1: Copy the file to your \QUAKE\ID1 directory.
STEP 2: Load the Quake game as usual.
STEP 3: Once the game is loaded, hit the ESC key to bring up the
        console and type MAP followed by the name of the file.

For example, if the filename is 5150, you would type:
MAP 5150    at the console.

As with all add-on levels, updates, or patches make sure your original
files are backed up. PC Gamer will not accept any responsibility for
problems caused by these files.