Visual Studio External Tools Menu

Further to my post about setting up Windows Explorer as an external tool within Visual Studio (http://www.neilpullinger.co.uk/2008/03/open-visual-studio-project-folder-in.html), I have set up a number of other tools set up in the same way. Here's my list now:

Title	Command	Arguments	Notes
Run test	(full path to nunit.exe)	$(ItemPath)
Reflector	(full path to reflector.exe)	$(ItemPath)
FxCop	(full path to fxcop.exe)	$(TargetPath)
Explorer	(full path to explorer.exe)	/e, /select, $(ItemPath)
Open in Notepad	(full path to notepad.exe)	$(ItemPath)
Open	(full path to a batch file containing just "%1")	$(ItemPath)
Error Lookup	(errlook.exe, in VS\Common\Tools folder)	(none)	Not sure where this one came from; installed by default?
Spy++	(spyxx.exe, in VS\Common\Tools folder)	(none)	Installed by default

I've excluded a couple of the others that are there by default (eg. Create Guid and Dotfuscator).

(Edited 19/12/2008)