The problem on frames is known, and it's the MFD. The plane remains always flyable, but with a cost, indeed. Do you try with the new version (called 75th anniversary) ? As I already said, I think this new version is a stepback, but it's still has qualities, and is lighter on frames. And you can keep the two versions.
With the ancient version, there are some tricks, that you can find in the manual. And you can also try to deactivate the cockpit of the copilot (there's a switch on the back of the left console, I think).