The selp_map.zip file you have requested: Maps Levels Missions / Single Player / S to T Titles / Southeastern Lan Party - 2.21mb is not available. Perhaps try browsing all files for the game Half-Life and upload any files you want to share or are missing. This is the only information we could locate:
Map:Southeastern Lan Party
Lanparty address: www.planetquake.comga It's Single player and deathmatch.