That's really good advice and I hope most people do it this way. :)
When I took Fister to the vet, he never liked the car ride, but the rest of it was no problem. There was a calm atmosphere in the clinic and I think Fister could sense that the vet liked him. One of the first times he went there, the vet did spray his cage with that calming stuff... I didn't even know it exited at the time. The vet didn't have a seperate examining room for cats and dogs, but we usually only had to wait for 5 min. and Fister was not agressive towards other animals.
I tried his box out, too, and one time he jumped in it and fell asleep, but most times I had to put in the kitchen while he was in the bedroom sleeping. I carried him out there and put him in it, it worked fairly well, if he was asleep. He did complain a little, though.
The worst was when he had to go to a cat hotel when we travelled, he screamed all the way in the car, and one time he made quite an effort to get out, to the point where some of his claws came off. That, although we had covered the box with a blanket.
Later in his life, I got this old pram to transport him in, a ten nimute walk through the cemetary, that he seemed to like, he could watch the squirrels and birds on the way.
This is a picture from one of his trips...
http://petoftheday.com/talk/attachme...1&d=1253041221