Have a look at this thread.
"ultimate cd"
Someone kindly pieced together a lot of e34 stuff and made it available (including the manual). The thread includes a bunch of links, so you'll have to sift through them to find a good one.
However, please buy a harcopy of manual as:
1) it supports Bentley who did a great job
2) you'll be glad you did as its much more user friendly
Dave M