macosmission-control
I have purchased a Razer DeathAdder Black Edition mouse, and the latest Mac driver I can find for it is 1.00. The possible assignments for the side buttons don't seem to have Mission Control buttons available for them (they only have various Expose keys available)
Is there a hack around this? Or do I just have to do without? Or exchange for a different Razer mouse with a more developed Mac driver? Or just use the Mac driver for a different Razer mouse?
You can disable the keyboard shortcuts for slow-motion effects by following these instructions:
Open Terminal.
Open the plist file in your user's library preferences folder that contains the setting by typing open ~/Library/Preferences/com.apple.symbolichotkeys.plist and hit return.
A window similar to this will open in Xcode:
For items 34, 35, and 37, set enabled to NO.
Close the file, click Save if prompted, and restart your system.
Enjoy.
Note: 34 and 35 may not be present in the plist if you have never opened the Mission Control preferences pane and changed the "Mission Control" or "Application windows" settings. If 37 isn't present either, simply add it yourself.
This process has been tested with:
Go to: System Preferences-> Mission Control and choose "-" in Mission Control shortcut 
Best Answer
I'm not familiar with the particulars of your mouse and the associated drives, it probably hasn't been updated for Lion yet, so I wouldn't expect any Mission Control options built in at the moment. The simplest way would be to see if you can have the button assigned to a particular keypress, which you can then assign to Mission Control in the Keyboard Prefs.
If that doesn't work, try Steermouse, it's a 3rd party mouse driver that works with almost every extra mouse you'll find, and gives you some additional features and flexibility.