EntGaming:MapsSizeBypass
From ENT Wiki
Warcraft 3 Map Size Limit Bypass
This tool is used to bypass Battle.net's map size limit. It means you can play maps bigger than 8 mb.
How to set up
Move the FixSizeLimit.mix file in your Warcraft 3 directory and start Warcraft 3.
If you now join a bot which also supports map size bypassing, you can play the map. You can host your own private game, too.
Keep in mind, all users must use the tool in order to play (bypassed file size) maps with you.