How can i make only admin able to upload avatars n users hav gravatars

Hello, I been trying to work out how i can make it so only users can have remote gravatar avatars using the gravaatra extension and only admins are the ones who can upload avatars. I really don't want people uploading pictures onto my server.

Anyway has anyone got any suggestions?

i tried

http://punbb.informer.com/forums/topic/ … -by-admin/

But i couldn't find what to edit because probably a older version..

Also has any one got any suggestions for remote avatars on punbb 1.4?

Thanks