I know there has been such thread, but search function in smf isn't the easiest one. I can't find it.
Please link me to tutorial on how to make php pages to be in cpg.
What's wrong with SMF's search? I guess what actually is wrong are people being too lazy to re-phrase their search terms if they don't get the expected results. Searching for "custom php page" had the expected results - it showed one of the many threads where this has been explained: "About me plugin (http://forum.coppermine-gallery.net/index.php/topic,48468.msg232221.html#msg232221)". Similar thread that explain the same thing are http://forum.coppermine-gallery.net/index.php/topic,50028.0.html, http://forum.coppermine-gallery.net/index.php/topic,50854.0.html or http://forum.coppermine-gallery.net/index.php/topic,21000.0.html to only name a few.