Unzip the file and transfer the file DM_Killbox_5BOX.BSP into directory half-life2 deathmatch/hl2mp/maps/
2) File info
The zip file contains the BSP map and a couple of JPEGs
3) Map name is 5Box, developed by myself ( BullThere are 5 square rooms, each room has something unique about it; whether it be blocks flying around, or lots of moving platforms.