A very cool way of adding assemblies to the global assembly cache.
http://mitchvanhelden.blogspot.com/2011/01/gac-assemblies-with-right-click.html
http://biztalkia.blogspot.com/2005/12/easier-way-to-add-dll-to-gac.html
Windows Registry Editor Version 5.00
[HKEY_CLASSES_ROOT\dllfile\shell\gacutil\command]
@=”c:\\windows\\Microsoft.NET\\Framework\\v1.1.4322\\gacutil.exe /i \”%1\””