You haven't told us what version of InDesign you're running. The answer depends on the version.
If you have InDesign CS5 or 5.5 and you choose File > Export > Adobe PDF (Interactive), you can choose the Layout (single page or scrolling) and the magnification of the initial view.
If you do not, you'll need to set it in Acrobat Pro in File > Properties after you export the PDF file.
In either case, you can't disable scrolling, you can only set the initial view. Your viewer can set whatever viewing they wish.
i'm working on cs5, but at the moment don't have access to it, so it's just off the top of my head.
i wanted my exported pdf to open automatically in full-screen mode (which i managed to do) and use only specified hyperlinks for navigation (i.e. go to the next page, or go to page x). if i got you right, this is impossible. could i achieve this exporting to swf?
While you can open the file in an interactive PDF in full screen mode, you can't restrict people to doing it.
Exporting SWF files have their own limitations (doesn't work unless you have access to Flash, for example). You have to figure out what your audience will prefer to use.