Sorry buddy as far as I know this can't be done - I'm using Liberte myself at the moment and would really like to see Bitcoin software on there but I think it's a built in security feature that no apps/drivers can be installed - obviously you could rebuild the entire image but it wouldn't be as secure.If you need to print something out, I suggest encrypting it with PGP then mailing it to yourself so you can do the deed on your other OS.Although Midori can be buggy and can leak DNS requests, it is very lightweight which means the installation can be saved and boot easily from USB - there's no particular reason to use Liberte Linux if you want a secure OS, it's just good "out of the box" solution for Tor lovers - for instance it's very easy to put an encrypted install of Ubuntu on USB which would include Firefox, printer drivers etc. - if you need help feel free to send me a message!V.