First, I'm sorry about this. Because I'm joining in a contest at CodeProject and they required using Visual Studio 2010 Beta2. You can see my article at CodeProject here : http://www.codeproject.com/KB/macros/gbackup.aspx
You can use the source code I posted there to compile on your VS 2010 RC ( need VS SDK ).
In the mean time, I will rebuild the installer on VS 2010 RC and update soon.
the first time I start vs 2010 rc after installing GBackup I get the error:
The Add-in 'GBackupSolution' failed to load or caused an exception. Would you like to remove this Add-in? If you choose yes, the file it was loaded from, 'C:\Users\Gab\Documents\Visual Studio 2010\Addins\GBackupSolution.AddIn', will be renamed. Error Message: <Unknown Error> Error number: 80131513