coccinellid

Hey all. After leaving in US for couple of years i got to Brazil and now I want to upload a map I can use here on my Garmin nuvi 200. So i bought a CityNavegator of Brazil on the Garmin web site. I was suspecting it wouldn't have enough space for both maps but I assumed that during the upload process i would be given the option to delete the previous map. When I went upload the map I got a message saying there was not enough space with not directions of how i should proceed in order to free space on my device.

The only one file big enough to save the amount of space I need is gmapprom.img but I am not quite sure I can just go ahead and delete this bad boy without messing things up. What do you guys think I should do???