700i Map Themes

I see there are two map theme files in the MAPTHEME folder named Popularity.kmtf and Marine.kmtf

I tried editing the Popularity.kmtf on my computer and then placing it in the GPS MAPTHEME folder but when I booted the GPS up my edited file got overwritten with an OEM Popularity.kmtf file.

So evidently the 700i does not allow editing kmtf files like you can in the Zumo XT

Is there another way to customize line thickness and color? TYP file?