Try these sites:
http://www.cdspeed2000.com/ or Booktype Management 8.4 or
http://www.k-probe.com/kprobe-bitsetting-booktype.php
Keep in mind that not all drives will allow you to do this and only +R can be changed.
If you do a search in CDFreaks on Booktype or Bitsetting, you will see that this is a subject with much information.