I found a piece of software that was designed for resizing multiple images, one of the little tacked on things it does is create a single PDF 'album' of all the images it has resized... Which works perfectly on the 505.
Basically I set the preferences for resolution and I select it to rotate by 90 degrees then you drag the images onto the window(max of 50 in the demo) and it creates a PDF.
I have used it for Dilbert style strips they look great on the reader.
It is called BCI and is here http://www.ingconti.com/Software/BCI/ConvertImage.html