There would only be a plist file for an application that was opened by the user.
Only the thread originator, that is the "original poster" aka OP or an Admin can change a thread title. No, don't start another thread, it would confuse matters, and thus is a violation of forum rules.
Ok.
Difficult here trying to help by proxy and the OP is not here at the moment (again!).
I have the machine on at the moment but to be honest I'm just plain cheesed off with it and considering erasing the drive and reinstalling to factory settings with the original discs.
Drastic I know, but looking at the HD, with only 26G remaining, Photos and Music files all over the place and all sorts of bolt-ons such as Spotify, Utorrent, ,MS Messenger, Graboid, PrismVideo, Firefox installed perhaps this is the way forward?
The problems appear to be cross-application, certainly I would consider the inability to use iPhoto/iTunes/Pages in any meaningful way abject.