mouse
I have a Microsoft Sculpt Ergonomic Desktop, which is comprised of a keyboard and a mouse. The mouse wheel started acting strange lately, and I am quite sure some dirt entered it.
Unfortunately the thing has no visible way to open it. I did not find a single useful resource on the web about the topic.
Do you have any experience in opening this mouse?
After a bunch of digging around, I finally found a link on AutoHotKey with precisely this issue. I've tried the suggestion and it seems to work well.
Here is my autohotkey script that I am using to rebind my Windows button to be the back button, and the back button to be a forward button.
RWin::Send {Browser_Back}
XButton1::Send {Browser_Forward}
It is probably too late to answer five years after asking... There is an option now that is documented and supported by MS to simulate a standard middle click with one tap using Three Finger Click. Not sure it was an option that times. Also not sure it is much more comfortable to perform a single tap with three finger rather than double tap anything. But hope it helps those who stumble upon this answer. It just works and supported.
All you need for this is two following steps (no reboot):
I've found the answer here in the forum post of 2018 in MS Community.
This is how this setting looks like: 
Best Answer
From http://forums.windowscentral.com/ask-question/348901-does-anyone-know-how-i-could-disassemble-microsoft-sculpt-ergonomic-mouse.html
Basically you need a thin plastic tool to remove the top cover of the mouse and a set of Torx screwdrivers to finish the job.