will you please clarify if I should be able to run calibre in Vista 64 and get it to recognise my Sony PRS-505? I am not sure if your message on http://calibre.kovidgoyal.net/download_windows
"you're out of luck" is definitive as I thought the following paragraph was a work around.
I have it running and recognising the reader under XP in a virtual m/c but I have failed in Vista 64. I cannot get the driver in calibre to install. I get a message telling me that the .inf file is not in the correct format. The reader is showing up in device manager as a disk drive with a standard Microsoft disk.sys driver.