I am sorry I can't help as we don't get out little guy until Saturday
My mum however has a Westie and he totally hates being in the front seat of the car or sitting on someones lap he goes crazy, shaking constantly and being restless.
Stick him in the trunk though (one of those big estate type trunks) and he loves it, either just sits there looking out of the window or falls fast asleep within minutes!
So, sorry I wasn't really much help there :S