The code mods necessary for proper CBM functionality in Moodle 2.2-2.4 are now available at tmedwin.net/cbm along with links to demo sites for Moodle 1.9, 2.2 and 2.4. There are just 14 files with changes, and these can be copied in (or restored) with a single operation.
Please email me (ucgbarg@ucl.ac.uk) or use the forum at tmedwin.net if there are any issues or suggestions for improvement.
Tony Gardner-Medwin