The Vanderbilt regime is the one used by Charles Stratton at Vanderbilt University. He and Prof. Ram Sriram are really the brains behind all this. My husband David's regime is based on this but uses roxithromycin which we can get here in England, but you can't in the USA. It is basically what you are on already. They often prescribe minocycline in preference to doxycycline but doxycycline is kinder on your liver. When you go onto intermittent treatment you won't be able to use rifampicin, so will have to change either to azithromycin or consider importing roxithromycin (as Rulid, the original brand by Aventis) from http://www.drugdelivery.ca/
which is a very bona fide website.
With regards to flagyl, the good thing about is that on this treatment, it can be added when convenient. For instance, if you are going away, or have a really bad cold, say, leave it until you get back, and so on.
An idea: why don't you consider starting your own Regimens thread, by clicking on the 'New Topic' button to the bottom left. I know antibiotics seem to be taking over this section, but it was started before Aaron started the 'Antibiotics' forum.