Possible Duplicate:
Back / Forward mouse buttons do not work in VMWare Workstation 6.5 Guest OS
I have a problem very similar to this but my host system is Win7 and my guest system is OS X 10.6. I already have usb.generic.allowHID = TRUE in my vmx file. I also tried steermouse. USB overdrive crashes for me after installation+restart at the window asking me to configure/buy/try. Any help is appreciated.
EDIT: I think all the buttons "work", but the 4th and 5th (back/forward) buttons are detected as the third button (middle click). When I click the 4th or 5th button in Firefox the auto-scroll action is triggered.