I have a site with the pligg cms and another forum with php code. I need it so that if a user log in to the pligg portion of the site and they go into the forum section, the same password/login info can be used without the need to log in again. (If that is too much can there be a button like one of htose log in with faebook button but do actually facebook but my web pligg button) and the other part of the site is a classified ads section where user would be able to post using there pligg log in but they wouldnt have to log in again because they already did that :) but again a "log in with" button will work.
and with the classified ads portion, i'm hoping its a copy and paste operation so i'd finish it up with all the locations. Let me know what you think.