If you turn your scans into a PDF, take a look at the thread on Savory. It's a Kindle 2 hack that allows PDF files to be read on the K2 without losing their formatting (your page numbers will still be there). There is some zoom and rotation capability with this hack.
There is also PDFRead, which is software to turn your PDF into a series of images which become a "book" for your Kindle. There is no zoom but you can have the software rotate all the pages or even split them in half so that the font is larger.
Please see these threads for more information and image samples:
Savory
PDFRead