Can I integrate Joomla modules into dolphin?

Can I use joomla modules with dolphin?

That's like asking if you can use Ford parts on a Chevrolet.

It can't be done? Well how can I make a particular slideshow with background images to show in my dolphin site?

Start coding.  Of course, you'd probably want to utilize an SWF file and it depends on where you want the slideshow to appear... Perhaps you could think of using Java...

More detail gets you better answers.