It's not actually "Full Permissions" that are required, PHP (running as the username identified) needs Read/Write/Erase permissions to that folder and any subfolders or files.
It's just easier to give Full Permissions because Windows changes the names of the various permissions through the versions. So your server admin can make the permissions as tight as they need, so long as PHP can create, update, and modify files (as well as list files in the directory, etc). PHP basically just needs file access to that folder.
Let me know how it goes.
Dave Edis - Senior Developer
interactivetools.com