Garmin Mobile XT for Symbian.

 

I have a few unlocked maps in mapsource (i.e. japan and bermuda maps from rwsmaps.griffel.se). I wanted to put those on garmin mobile XT loaded on my samsung symbian phone. Is it possible to do it ? should i just use mapsource ? will it overwrite the existing city navigator locked maps loaded on the phone in XT already ?

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GPS Models : 60CSX w/2GB Kingston (stolen), 32GB Samsung INNOV8 with Garmin Mobile XT(8GB), NUVI 760 w/16GB PSF16GSDHC6 (DIED in 30 days), V (died), Nokia N8 with Garmin Mobile XT(48GB), Blackberry Torch with Google Maps.