Web - Server

Hi,
I managed to upload a file and found the correct wrapper to use it (since "php" is a blacklisted string theres only one left). I also found a possibility to include arbitrary php files on the file system, but I cant find a way to extract my uploaded file. There doesnt seem to be a parameter that executes it. Sorry for the cryptic description, I dont want to spoil anybody. Thx for your help.
greets corn