[garygibsonsf]

I think it might be a problem with my PID after all. I got hold of a drm-ed file, a .prc. I then borrowed a windows laptop (as opposed to my usual ibook) and downloaded and installed mobireader onto it. The book opened on it fine. I clicked on devices, and there was a ten-digit number in the mobireader program that was, or so I got the impression, the PID. I emailed that to my ibook and tried it just now using that command line and with both the .py and the prc file in the same directory; but no luck. Except this time it did tell me I had an invalid PID. So maybe I'm looking in the wrong place for it. Hm.

Edit: I had a look under 'devices' in the mobipocket reader program on a windows xp machine, and there was a ten digit figure listed there (under the details for that pc) that I believe must be the PID, but it didn't work, unfortunately. Back to the drawing board for me.