Initial alpha release for testing.
Download the zip file and extract both files to the VS add in directory. You can find your add in directories in Visual Studio by selecting Tools -> Options, and then Environment -> Add-in/Macros Security. I use %VSMYDOCUMENTS%\Addins which is C:\Users\Me\Documents\Visual Studio 2008\Addins on my machine.
By default the add in will ensure no more than 10 editors are open at a time. You can configure the number of editors that can be open at a time by going to Tools -> Options and then Text Editor -> Auto Close.