You've the basics covered very well Bob. You'll have to try different dealers to figure out whether they will help or not. Your advantage is that your UK credit history can be used/accepted by lending institutions.
I am not sure about new cars, but used car could be financed albeit with a larger down payment and/or higher interest rate.
You should talk to insurance companies to figure out which ones would accept your UK insurance record, that could cause a rethink on vehicle choice.
or you'll have to find a used car dealer with insurance agent services that would help you get over these hurdles. They're out there.
All good points. The local ford dealer was hilarious, talked the talk, but when I wanted to look inside a shelby mustang he wouldn't even open it, said it was locked (and this is inside the showroom), said it was a performance car and some people buy them with the dealer stickers on and won't even drive them. I said I just wanted to open the door and look at the interior... not sit in it... nope, it's staying locked, "it's a performance car don't you know"... What a moron, didn't tell him that BMW gave me a Z4 for the day, or that I got to test drive an Exige for an hour, oh, and I bought both. I won't be going back there...

Thing is about buying used and/or getting a loan is that all our money is going into buying a house at the moment, so very little left for a car, we need a 10% downpayment for a mortgage due to our temporary SIN's [sic]. So a $0 down deal on a car would be great...
AB do you mean use a UK credit card? Why would I want to do that, that would only leave me with sterling debts that would be a nightmare to pay off.