Ok, I decided to publish the spreadsheets for anyone to edit. Here are the links to the googledocs:
Vehicle Data:
http://spreadsheets.google.com/ccc?k...YNVxQNB35y8tXg
Tire Data:
http://spreadsheets.google.com/ccc?k...YNX8vYODcDaObQ
This is for a good cause, so I hope we get the help we need...