at the bottom of the connection screen there is a couple of buttons, turn private=off, public=on, empty=off, and reset=yes and make sure all of you car names are grey (not blue or red) like this:
You don't do anything with the skins. They are other's skins for you to see, not to use. They are saved automatically in the proper folder for you to be able to view them on the other racer's cars.
2 weeks away...but any way i love haloween..makin jokes on trick or treatin...tellin hotties there hot...steal candy when they leave on porch...yeah..is all good