Just Successfully tethered and Am writing to you using the tether. I used "ASHELL" and "SQLITE MANAGER" both can be found for free on the market.
Go into aShell, check the “Root” box at the top, go to File Explorer, then go to data -> data -> com.motorola.android.providers.settings -> databases -> settings.db, open it with aSQLiteManager, click Settings -> Data, click “PgDn” until you get to 150, click “Edit”, change the value to 0, then press the back button soft key until you are prompted to save the changes back in aShell, save the changes, and reboot your phone. Then enjoy =)
Big thanks to Kendallhabra on DroidRAZRROOT forum for the instructions.
Forgot to mention you need to be rooted to use this method.