It sounds like you have an anxiety disorder with agoraphobia, and perhaps some tendency towards obsessive thinking. While your symptoms are extreme and I'm sure feel absolutely awful, this is generally a very treatable condition- as you have experienced in the past through your hard work on changing your thoughts.
What happens when you try to use these skills now? Have you returned to the tenets of the program you used in the past? Have you ever (or are you now) taken medication for anxiety? I would think that returning to the kind of cognitive behavioral program that you used in the past, plus potentially adding some medication to help you manage the more extreme symptoms in the short-term, would be a very effective combination for treating your anxiety disorder.
If you don't already have a psychiatrist, I would think that the first step for you would be to find someone near you to meet with, who could potentially prescribe you medication. That person can also either help you follow the behavioral program or recommend someone else who can.
It does sound like social anxiety/social phobia to me- including your fear of being noticed. In fact, this is one of the hallmarks of a social phobia. I would suggest your checking out the website www.socialphobia.org and also www.socialanxietyinstitute.org You might also play with the website www.moodgym.com as this helps people identify and correct irrational thoughts- my guess is that the focus of this site is similar to the social anxiety CD that you're using but could be a good reinforcer of these habits.
Please let me know if you have other questions.