search for CIC or CCC (i never know what these mean except one of them is the newest computer with harddrive and highdensity screen) - you can upgrade to the new version which is much better than the crap that came with our cars. It is a involved process and here is one of the threads to start you off
http://www.m5board.com/vbulletin/e60-m5-e61-m5-touring-discussion/158500-2010-cic-retrofit-installation-log.html
http://www.m5board.com/vbulletin/e60-m5-e61-m5-touring-discussion/158500-2010-cic-retrofit-installation-log.html