By looking at the editbin's documentation: http://msdn2.microsoft.com/en-US/library/203797te.aspx And since no parts from Windows require more than a few MBs in memory I still don't understand why would you want to modify Windows files. Just use it on the game (or whatever exe), make a tweak (could be addon) for context menu option and put editbin in system32. There are few alternative shells out there already, try them, maybe some of them are open source so you can contribute. I'm not interested in that, or lets say I can't handle all at once.