I've been walking our cat on a daily basis for almost four years. The trick is to get the cat used to the harness in the house first, by putting it on for a few minutes over a couple of days, increasing the amount of time it is left on each day. I use a dog harness with plastic clips, not only because it is more stable than a cat harness and easier to put on, but also because it is more difficult for the cat to slip out of, seeing as it has an extra band that runs between the front legs. I also have a "Safkat" jacket http://www.safkat.com
, which is more appropriate for colder weather than we're having right now. I also use a retractable leash, and always have some reading material with me, because a lot of the "walking" consists of stopping to watch birds, people, etc. from behind a bush. With a little bit of practice, I'm sure your cat will learn to love it.