Within the directory where you have built cmbeasy, you can auto-generate the html
documentations by running "make doxy", which will create a doc/html/ directory.
For convenience, you may browse it online here:
For an introduction to cmbeasy, please see also astro-ph/0302138.
Some notes on modifying the code can be found in the online-documentation.
The theory of the Monte Carlo driver as well as the AnalyzeThis class is described in astro-ph/0311311.
For an introduction to the monte carlo driver of cmbeasy see howto-montecarlo.txt (for a copy, see the montecarlo directory of your installation).
For a paper on speeding up Boltzmann codes, see astro-ph/0503277. In there, tight coupling and the late time evolution of relativistic perturbation are discussed in detail.