I use a much-loved, venerable Kensington Expert Mouse Pro rollerball instead of a conventional mouse. Very nice, no RSI. BUT Ican't get the press-wheel-and-drag-mouse deal to get a roll. To befair, (using SW 2008) I can get it in 2 clicks (using right click)but it's so common I'd like to do it with one click of one of the 4buttons. Can't figure how. Not a stopper, but if anyone knows theanswer, I'd be grateful for advice.