Not possible at all. These are two different radio's with completely different firmware. Doing so would break the phones radio.
Ok, but with this new 2nd init hack, will we be able to somehow edit and fix the radio firmware so that the reception is better outside of the Verizon's network? (On my D2G I get 1 signal bar whereas a Milestone 2 gets 3 bars at the same place with the same GSM network)