Hello soleblaze, I would advise to check out the web site http://www.mobileread.com. They have a forum (http://www.mobileread.com/forums) and a wiki (http://www.mobileread.com/wiki/Main_Page and http://wiki.mobileread.com/wiki/E-book_conversion) that detail the workflow and tools that you need.

There are some fans over there of using the N770/N800 as a mobile reading device. And some folks have scanned books in that were not available in any e-book format just so that they could read it on their Nokia device. They detail the workflows and tool chains.

Travis