I've currently got Calibre set up with custom Yes/No column named 'Read' to indicate whether the book has been read or not.
What I'd like to do is use this Yes/No column to create a collection on my Sony Reader for read books (and unread books). Currently Calibre creates collections based on tags, but is there any way to use my custom Yes/No column to create a collection (or a tag, which itself will create a collection) when sending to device?
I know I could do this by way of abandoning the Yes/No column and adding 'read' and 'unread' tags to everything, but I'd rather avoid that if possible, because I want to keep the read status separate in my library.
Thanks.