I think she's nearing completion.

The boots were surprisingly easy to put on her (thank You, Jesus!) once I worked out how the funny little separate knee things went on. And I got her headcap off by cutting the little piece of elastic that it had been tied to the ring with. Being able to tug on her elastics helped much with the changing. Then I just tied them in a knot and hot glued her headcap back on.
The clothes seem to me what a cat might like. Simple and not too much so as to prevent overheating with the fur. And the colours? I have no idea, but they fit her, I think.
The next step? Perhaps taking her tail off her default dress and fixing it to her butt somehow. We'll see.