This is something that should be automated with maxscript perhaps. I may release a new version in the not too far future. I think I at least understood the skinning issues that I can fix them.
I personally don't mind that the vehicle colors are not included, as I simply use GTA material to set and copy the colors from, thought it may be a waste of time to script.
As for skinning, I'm really looking forward to news on that particular issue. I may not go back to skinning before I get hands on a script which supports smoothing, as KAM's makes it all hard edged. I'm already using your script for vehicles and I got to say a huge thank you for your effort!