full guide is here
http://lagabuse.com/forum/index.php/topic,117670.0.html
If you start the gproxy and the game , log in and it just closes the game and in gproxy it says Path not found or / run WC3fixer.
Download Wc3Fixer and puth your right path ( DONT FORGET TO REMOVE THE \Diabollo 2 FROM THE PATH !!!) If that also didnt help than put your wc3 into Program(e) Files folder almost always --> C:\Program Files\ and dont forget to rename your wc3 folder to "Warcraft III". If that didnt help than you have to reinstall your Warcraft III.