The skins in this pack were created using my automation techniques described in this thread:
http://www.racedepartment.com/downloads/skin-creation-automation.7361/
All the skins have numbers and matching helmets. The icons will tell you which colors are included on the skin.
This screenshot should give you an idea of the colors included in the pack.
The directory names in this pack have been renamed from before to help with the automation process, so you may want to delete the old directories.