1) Start the editor
2) load a map, any map will do(taking care to avoid any exclusions noted in step 4 later)
3) compile the map
4) if there are no compile errors go to step 5, or else either fix errors or go to step 2-excluding this map.
5) attach debugger
6) trace point at which the cbf packing begins(once you have found it it will always be at the same place, making it much easier to find in future)
7) observe the map files appearing in the registers(as null string pointers) at precise moments
think about the next step, knowing that in your debugger you can change register settings...... Mymap.cbf ~ mycbf.cbf