1. download from xdebug.org ( use the 32bit ntf version , eg : php_xdebug-2.2.0-5.4-vc9-nts.dll )
2. put dll in "ext" folder
3. add the extension config to php.ini :
;[zend_extension]
zend_extension = ext\php_xdebug-2.2.0-5.4-vc9-nts.dll
4. NOTE: to enable site debuggable , should switch on the setting for target site ( could put in separate "user.ini" files )
xdebug.remote_enable = On