JAD and COD file are different kind of file.
the sub-COD file will be located in the same URL as the JAD.
by inspecting the JAD, you can see that the files names are ImageSample.cod and ImageSample-xx.cod where xx is [1-22]
Not sur to understand what is your problem / goal. If you whish to install the cod, simply open the JAD with a browser or use the Desktop App from RIM if you got the files in local.
How is this related to PhoneGap ?