DUKE NUKEM 3D
     
To load a custom Duke Nukem level, copy the file into your Duke Nukem
directory (usually \DUKE3D).

If the file is zipped, unzip it using PKUNZIP (not provided with 
this CD).

Once you've copied the file to the Duke Nukem 3D directory, load
Duke Nukem by typing SETUP instead of DUKE3d. Then choose the
"Select User Level" option. The new MAP should appear in this listing.

For example, if the name of the file is BRIDGES.MAP, BRIDGES should
appear in the "Select User Level" list once it's copied over to the
Duke Nukem 3D directory.