Flash and mock-ups

Hello everyone,

I believe most of you faced situations when client asked you to send him a mockup (of flash-website, application, etc.). But Flash in not a static page, you cannot just draw a couple of pictures in Photoshop, you have to show some functionality/animations/interactivity. But this takes time and resources to make! And client want a free mock-up, he would not pay you before you show him some result.

So the dilemma is you don’t want to work for free, but you want to get a contract! How do you prepare your mockups (what technique/software do you use, so the client likes the result and you don’t do the whole job for free)?

Thanks.