Chuck Hill
Pierre Bernard has some very cool qualifier extensions on his site:
http://homepage.mac.com/i_love_my/code.html
You might find what you need there or at least a good starting point.
Pierre Bernard
The qualifiers referenced by Chuck have been folded into the Houdah WebObjects Frameworks project. More information can be found in the Wiki:
http://code.google.com/p/houdah-webobjects-frameworks/wiki/QualifierAdditions