how to have Faros FMGS A320 Trainer for the PC?
Sorry to disappoint you but there is no such thing as a Faros FMGS A320 Trainer for the stand-alone PC. This info comes direct from the manufacturer.
When you play with an FMGS trainer at a TRTO, the program and database are fed directly off the FFS computers. Your PC would not be able to handle it even if you tried to copy the program off the TRTO's PC, as it does not function without all the data provided from the mainframes.