Custom Map Patcher is a tool that allows you to play custom map on Battle.net.

Here are the basic steps that you must follow:

• Create the map "Lost Temple" on Battle.net and invite friends in
  
• Launch the map patcher
  
• Select the map you want to play and click "Patch"
  
• Go back to SC2, select "custom" game mode and start the game

Warning: Everyone must do these steps, else, the game will crash.

This was created by two people at sc2mapster. http://forums.sc2mapster.com/general/general-chat/646-tool-sc2-custom-map-patcher/ for more information.