The link is useful, but I would still need an idiot-proof procedure to upgrade from 2.0 to 2.2 in a Windows system, without compiling, everything pre-cooked, and using only php as 3rd party module.
I tried myself, and all I got was two separate program folders and didn't dare to uninstall 2.0...
Should I just install 2.2 and move in the old httpd.conf file?