There is a product called Feliway Comfort Zone that is designed to be soothing to a stressed cat. The site drsfostersmith.com (http://tinyurl.com/n5rjn) carries it Check out the articles on the site too -- I've found them to be very helpful.
You can find Feliway products at vet's offices, various pet websites and on eBay. Good luck with your sweet kitty.
I have always been told that buttering a cats paws when you get to the new place will get them grooming, relaxing and settling in. I tried it 3 years ago when we moved 5 hour drive from our home,thinking it couldn't hurt anything...and Curtis our cat settled right into the new house quite easily.
Login using the form on the top of the page to post feedback (if you are a registered user). If you have not yet registered, click here to do so. It's FREE!.