Microsoft have removed the expression builder from the right-click menu in the Visual Basic editor in Access 2003.

I have tried to install Michael Kaplan's fix for this (http://www.mvps.org/access/modules/mdl0049.htm), but that only gives me the error "Input string is too long.@@@1@@1".
That may be because the fix doesn't support later versions of Access than 2002, but it could also be a "native" Access error.
When I googled for it, I could only find it mentioned in a few lists of Access errors, but none of them offered any solutions for it.

Does anyone have any good ideas as to what I can do?
Either a different fix for the original problem, or a fix for problem with Michael Kaplan's fix?

Any replies would be much appreciated.