Customizing side-scroll events in MS Optical Mouse

[mrwes]

In my office we have some users who prefer the Microsoft Mouse to Logitech mice. With Logitech, you can install uberOptions on top of their SetPoint software to have complete control of every mouse event: pretty cool.

No such luck with Intellipoint. Some of them have complained that the middle button is too hard to press down (it *is* pretty tough). We'd like to map a side-scroll event to represent a middle button click instead, but we need the requisite key:

[HKEY_CURRENT_USER\Software\Microsoft\IntelliPoint\AppSpecific\Revit.exe\EventMapping\4]

"Setting"=dword:000001f8

"4" is the event for a middle click, apparently, which we have mapped to 1f8, also a middle click (you could map a middle click event to anything else you want). If we could find the key for a side-scroll, we would add the Setting value to map that event to a middle click.

Hope I'm making sense. TIA for any help.