I'm no PHP god, nor even a PHP novice, but I don't think there's enough detail there for either of them to help you.

I'll hazard a guess here, and suppose that you don't really want an http server (i.e. Apache) in the first place (or at least don't want only an http server), but an SMB/CIFS server (i.e. samba). The http server permits access through a web browser, while the cifs server permits access through the windows file-management system, i.e. Explorer, or other smb/cifs clients.

If that's the case... it's a matter of installing samba, and configuring it. There's a version of samba at maemo-hackers, but it's somewhat old; don't know if it works with OS2008.