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never mind - already answred
Knowing how to repair plaster goes a lot easier for the do it yourselfer when you use the right stuff. For you, the non-professional, drywall finishing materials are the ticket.
To get more information follow the link:
The easiest method I have found is using adhesives and a little ready-mix joint compound. http://www.pbs.org/thisoldhouse/home/
The link is to a video that shows how it can be done with a limited amount of fuss and results that last. Also written up in TOH magazine, June issue. Good Luck.