I'm currently using a first-generation Microsoft IntelliMouse Explorer (with sensor speed update) on my G5. I have it set up to scroll horizontally when I roll the mousewheel while it is pressed. The problem is that the new versions of the MS Mouse driver for OS X (since the old version I'm using is PPC only) don't offer as much support for my ooold mouse...horizontal scrolling isn't even an option! So, I'm hoping people could advise me on what my options are to preserve this mechanic on an Intel Mac. I'm not fond of the tiltwheel scheme on so many new mice...do any support press+scroll for horizontal? Furthermore, can anyone weigh in on 3rd party mouse drivers? Both USB Overdrive and Steermouse seem like they'll offer the functionality I'm looking for. Any experiences?