I found the solution for the omnia early this week. I know several people already have this but since I didnt see it posted I thought I'd throw it on here. I also found Tony Cortez had this solution along time ago so props to Tony.

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Basically you just upload a cricket mmc and then rapiconfig the wap just like the Q's in the old days. From there you select the mms server in the settings and you're done.