CCC,
I do not understand you. You are so full of doubt, you seem to believe that enlightenment within the context of Theravada as discussed in MCTB is impossible. Yet you come to the Dho again and again.
Spend some time on the cushion. Metta is a good place to start, and then you can take the feeling of metta and use it as a concentration object, where you can attain a soft jhana in an easy and pleasant way. Concentration won't get you enlightened, but it will temporarily suppress mind-noise, of which doubt is a big part. At the very least, this will bring some peace and sanity to your day-to-day life. At the most, it is a solid foundation for insight practice.
The Seventh Army of MaraUnplug your computer, put away your books, and meditate.