open pproconf.exe (stop reading and do it...)
switch to gui tab
Change "None +wheel for alt tab" To "Left +wheel for alt tab"
don't see the link to the software any more.
so you are saying that you can use left click+scroll for task switching? Ok that is kinda of neet. my mouse software can do that (when in windows). but since my hands really only leave the keyboard when I'm play'n warcraft that means nothing to me as alt+tab works just fine and in most cases better than using the mouse.
granted my mouse software is pretty damn powerful, there maybe many users out there with out these cool features from logitech, but there is another version built to do it as well that works with other mice.