i don't think that there is any library for that. this project was realized only once (as far as i know) so nobody had the use for a library for the bluetooth modem. you could try this (the page of the developer of the bluetooth platine): http://www.asurowiki.de
you can klick on "Erweiterungen" on the left side, and can find the plans for the asuro eval board and some hints for the bluetooth modem.