Thanks guys, that's *exactly* what I needed. So, you *can* use it unregistered, but not full functionality (or indeed, apparently, just able to add books), so the sqlite command sounds perfect (I'm used to using the command line and sqlite so that's no biggie for me). I've seen those firmware instructions elsewhere (presumably on the firmware thread

), so thanks for that also.
I don't want a Sony, and this might sound stupid, but I do my best to boycott Sony products wherever possible since the Rootkit fiasco. I won't not buy a Sony "to cut my nose off to spite my face", but, I won't give them my business unless I absolutely can't find a better/alternative product (or go without, sometimes). The Kobo, apart from the silly activation/Kobo account nonsense, seems to otherwise fit the bill.
Thanks again,
Matt