Hi FHM,
You need the CB tab's tabid.
Try the following:
Find the tabid in table jos_comprofiler_tabs of the CB tab you want to display.
(I use PHPMyAdmin to work on the database tables, but your setup might be different.)
In the module's config, click to choose who's CB details to display. eg The logged in user or the viewed user's tab contents.
Put the tabid into this (cbtabwrapper) module's config and save it.
You should then see the CB tab's contents in your module.
Remember. Mikko says that not all tabs will work, so try a few different tabid's if the first one doesn't work.
Hope that helps.
-tayhow