(Instructions below are copied directly from www.inlandfaq.com )
Inland optical mouse / driver configuration for most inland mice.
Please un-install any drivers you have currently installed, reboot and then install the downloadable 3d/4d file. Future files can be downloaded from www.inlandfaq.com mice page.
You might need to select all and extract to folder of your choosing to properly run the setup, sometimes zipped files will run from location try to run (install) from location, but if you get an error message save files to your hard-drive then run the setup.exe. See picture at www.inlandfaq.com/mice.htm#Inland optical mouse for button setup. You should have an icon down by the clock - right click on this icon to set the mouse buttons. 3D is