I've done this to my Droid X and my MMS is fully working, I hope it helps flor your Global.
*Go to the Market and download AnyCut
*Once its installed, click on the App and click "New Shortcut">Activity>Scroll Down to APNs and create the shortcut.
*Open up the shortcut you just created, (it should be on your home screen. and copy the settings below.
*Now press the options button and click save. Make sure you select that APN you created by clicking on it and a blue dot would pop out.
*Go Back to AyCut and click Create Shortcut>Activity>Scroll down>Select "Proxy Settings"
*Find the shortcut on your homescreen and edit it with the settings below:
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