No - after patch 1.04 - I saved my first Africa Corps or Modern War Corps scenario and after that the scenario file have a new entrypted system and I can not start the scenario with the PC engine.Modders can still do their work after 1.04 as basically they were doing before.
Besides this is off-topic.
In all new saved scenarios I have this error message:
http://img20.imageshack.us/img20/4285/errormessagej.jpg
H.Balck