Please Help,

I have searched all forums and can't find what I need: I have a sprint contract running on a Nokia 6225. My wife washed the phone and of course it died. Since I have a new contract I would have to buy a new sprint phone for a fortune and none of the phones have what I want. I now found the Nokia 6255i which is a CDMA phone that should work, but it isn't a sprint phone...
Can I somehow change the NAM programming on my 6255i to make sprint think it's my old 6225???
Has anyone succesfully made a 6255i work on the sprint network? I have tried convincing the stores to help me, but they are adament that the phone will not work, even though I am sure there must be a way.