are you talking about chuggnut's unwrap tool? i think it should already work for max 9. the website is: http://www.chuggnut.com and a direct link to the download: http://www.chuggnut.com/scripts/unwraptools/unwraptools1.4.zip
I can't stand how it always reverts back to vert mode, regardless of what mode you are in the main window. And when the hell is Max going to finally make the hotkeys match up with the regular hotkeys for move, scale, rotate, etc in the UVW editor?? Did they "add" this in Max 9?