i have been using a program called "convert-lit"

so far i have used it on .ebo and .lit files which are the two types of ebook files i was using on my windows reader on my desktop

it takes ebooks and converts them into a folder that has the books as both an html file and as a .opf file

i download and convert on my desktop 'puter and then drag n drop the files into my n800.

both types of file are readable but the html looks like plain text but the .opf files look good in fbreader. the covers show up and the pages are laid out better.

way cool app for reading in bed, in portrait mode with finger taps to turn the page.

go here and check it out. i downloaded the top link

http://www.convertlit.com/download.php

if someone finds something that works better than this...PLEASE let me know