Just unzip this file into the Descent directory. Start Descent as usual 
and start a new game and select BRequip as the mission.

Ú----------------------------------------------¿
³ A NEW Descent replacement level for Level 1  ³
³ÛÛ²²²²±±±±±±±±°°°°°°°°°°°°°°°°°°±±±±±±±±²²²²ÛÛ³
³                  BRequip v 1.0               ³
³BRequip will take you into an infested mine   ³
³where you are there to stop the testing of the³
³new robot equipment. Be careful, most of the  ³
³Robots are cloaked and waiting for you to     ³
³stumble upon them.                            ³
³Large design and fully multiplayer supported. ³ 
³Documentation for use included.               ³
³ÛÛ²²²²±±±±±±±±°°°°°°°°°°°°°°°°°°±±±±±±±±²²²²ÛÛ³
³             Created By Brett Russell         ³
³           brettr@interramp.com)              ³
À----------------------------------------------Ù