If you need winzip get it at www.filesforfree.com/winzip.htm
Extract zipped map to this path: C:\program files\steam\steam apps\username\halflife2deathmatch\hl2mp\maps
Place ain files in graphs portion of maps folder.
dm_damage.inc.zip
dm_forgotten_sanctuary.zip sounds in sounds folder of steam
dm_tuscany_swat_special_v3.zip
dm_wallmart-legion-reloaded.zip