>The Installshield dialogs look kinda plain for what I have been asked to develop, (Flash buttons have been mentioned) and I don't know if I can get the functionality I want with HTML. What would you do in this case? I am also using Macromedia Dreamweaver and Fireworks for development. Any suggestions, alternatives etc. would be greatly appreciated!

Take a look at DemoShield. It can do what you're looking to do (although it's a bit expensive). They've got a downloadable test-version you can try out. You also might be able to use Flash and distribute the flash player with your CD (look at the license before doing this, though).