I work for Oxford, but I am not using this thread to advertise, merely to answer df1's question with factual information.
Oxford do not produce the whole course in CD-ROM format. They do, however, produce a CD-ROM for the CRP-5 and also, in conjunction with the Met Office, one which covers the JAA ATPL Met syllabus. They also produce VFR and IFR Comms CDs.
They have produced, in conjuction with Transair, a CD-ROM series for PPL. It covers the PPL syllabus at a good level of depth, including much, but not all, of the ATPL syllabus. All of these discs have been written by the OAT ground instructors.
None of the above is a stand-alone ATPL course; there is no substitute for book-learning. But you may find them a helpful supplement.
I offer no comment on the quality of the material; as I said, I'm not trying advertise. But other ppruners may wish to give you their views.