Default [Q] Possible to flash older radios from gingerboard to ICS/JB?

I'm on ICS 6.7.246. I was wondering if it's possible to flash the radio from earlier gingerboard version? I wanted to downgrade to GB but my understanding is that downgrading would brick my phone and therefore am thinking about flashing just the radio if possible. My perception is that gingerboard radio supports GSM 900/1800mhz as well and also gives better signal strength. I'm trying to make my phone work on 900/1800mhz band.

Is it possible to flash a gingerboard version including the radio in a rom slot using safestrap while keeping ICS in the stock slot? I guess not but just wanted to ask anyway.

Any kind of help or clarification is every much. Thanks in advance.