I have already uploaded books in .lrf format and now also make a .prc version for the benefit of people with other devices.

I've noticed that a number of people are posting books in .imp format. I would happily convert some of my BD files into imp.

But can anyone advise me about which settings in BD are best, so that the book displays well? Preferably simple ones.

According to Liviu_5, the settings I'm using with BD as fine. I've posted my BD settings screen for generating the IMP files to see if there could be a way to tweak it and it's fine. Have a look here...

http://www.mobileread.com/forums/attachment.php?attachmentid=5775&d=1190600765