Default Help with data settings when flashing Cricket handsets to other carriers.

So I'm trying to flash Cricket's Samsung Vitality (R720) to a non-US carrier. Everything is fine except for the data settings. For the NAI and PPP settings, it uses a different number than the MDN. This number is a code (5 digits) plus the MDN. The problem is that all Cricket handsets take just MDN numbers (10 digits only) for the NAI and PPP settings. Whenever it exceeds 10 digits for the MDN portion of the NAI and PPP, it reverts back to a default number upon reboot. For example, on cricket a normal PPP number would be 1234567890@mycricket.com. For this other carrier, the MDN would be 123451234567890@vzw3g.com. What can I do so that I can permanently enter anything I want on the PPP and NAI fields?

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