1) We're going to be changing up the registry so...Backup your registry.  Don't freaking blame me for your mucking up your registry!

2) In HKEY_CLASSES_ROOT/Folder/shell/ create a new key with a name that will identify your value later if you need to remove it.  For our purposes we'll call it MenuItem.  Give the MenuItem's (default) value a name that will appear in your context menu.  AKA "Menu Item".

3) Create a new key below MenuItem called "command".  Give this the path of the executable that you would like to open when you click on the item.

4) If you call the system/cmd.exe it will open handily in the current path.  Nice...yet I'll go one step further.

5) If you want to pass the current path to a application (like something you've coded up) append a ' %L' (space, percent sign, capital L) on the end.  This will pass the current path to the program through a command argument.  You can then pick this up through your string[] args in your main method.  Nice!