Maps processed. Thanks @Ricko

If you have Symbol Set 3: Modern, the vector style there contains several vehicles drawn using CC3+. And you can explode the symbols to get a good look at how they are constructed.

As a non-artist, drawing vectors in CC3+ would be my way to go, as I am hopeless with those image editors, and prefer the precision I get with snapping and coordinate/angle inputs.

Yea, that's it. Portable should be fine. Depending on which ImageMagick version you get (dynamically linked, statically linked, etc, etc,..), there may be some .dll files in the archive, just throw all .dll's in there with convert.exe to be on the safe side. Leave the existing ImageMagick folder as it is.

It improves performance of the final conversion step after export. Convenient, but not important as it doesn't change any functionality. The older ImageMagick 6.9 version should have all the files.

Great idea. Sounds fun.