[Q] WP7 Reg Import

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I have an HTC ARRIVE CDMA US Cellular is my carrier. I have Flashed it with this rom
http://forum.xda-developers.com/show....php?t=1499981

I was having Issues (such as MMS not working because it was looking for sprint among other issues) because the rom is built off a Sprint Rom so I reflashed my US Cellular Rom and have my phone back to normal. My question is would would it be possible to use osbuilder to pull apart the custom rom (linked above) and insert my registry from my us celluar rom. i already have it dumped and edited with the interop unlock because i have flashed a modded us cellular rom i made to have the interop unlock until i could figure something out. the regestry controls all things branding wise it seems like access to the mobile operator marketplace, MMS Service (I found that reg entry). so would it be possable to swap the regs so that the phone whould still be working 100% with us cellular and still have a full/root unlock if the custom rom?

I didnt think about it before but instead of trying to import the registry from my US cellular rom would it work if i used OSbuilder to swap the operatorpkg inside of the oem folder use the uscellular operatorpkg instead of the sprint operatorpkg thats in the rom.


EDIT I have Swapped the operatorpkg and built a rom but ever time i flash it my phone just shows the HTC logo screen for a few seconds then it reboots over and over

I found out i just need to run the proxml files from my us cellular rom image on my flashed rom but i dont know how the phone is cdma so i cant run the htc connection setup and if i try to run the htc-provxml it says carrier not in database
this is what the file i need to run contains to fix my mms service:
<wap-provisioningdoc>

<characteristic type="NAPDEF">
<parm name="NAPID" value="USCInternet" />
<parm name="BEARER" value="CDMA2000-1X-MOBILE-IP"/>
<parm name="NAME" value="USC Internet"/>
<parm name="NAP-ADDRTYPE" value="APN" />
<parm name="MIP" value="1"/>
<parm name="NAP-ADDRESS" value="+00000"/>
<parm name="INTERNET" value="1"/>
</characteristic>

<characteristic type="NAPDEF">
<parm name="NAPID" value="USCMms" />
<parm name="BEARER" value="CDMA2000-1X-MOBILE-IP"/>
<parm name="NAME" value="USC Mms"/>
<parm name="NAP-ADDRTYPE" value="APN" />
<parm name="MIP" value="1"/>
<parm name="NAP-ADDRESS" value="+00000"/>
</characteristic>

<characteristic type="APPLICATION">
<parm name="APPID" value="w4"/>
<parm name="NAME" value="USC"/>
<parm name="ADDR" value="http://mmsc1.uscc.net/mmsc/MMS"/>
<parm name="TO-NAPID" value="USCMms"/>
<parm name="MS" value="1000"/>
</characteristic>

</wap-provisioningdoc>