Just posted on the latest version of my free GUI for the mkgmap compiler. Now supports .mp files, input of a map ID number, and a few other options.
http://freegeographytools.com/2010/free-tools-for-custom-garmin-vector-maps-xviii-full-gui-for-mkgmap-compiler
Can't download and run it from work, so two questions:
Does it support customized Styles?
Does it support customized TYP files?
I do not see any options for custom styles/typ. The description does say: This isn't the full set of options supported by mkgmap; I've left out all of the routing options, and a bunch of others associated with creating full mapsets.
Guess I'll have to stick to the command line for a while.
Work in progress. I also figured that those who are taking advantage of the more advanced options are already reasonably comfortable with the command-line options. I'm also a newbie with mkgmap; as I get deeper into it, I'll probably add more options.