EEC Interior Modding

[Dethrone1427]

Evening, Does anyone know how difficult it is to alter the interior of the cars? Its just the EEC mod is an incredible mod, but I would really like to alter the interior of the Ferrari 458 to something similar to the 430 just because the quality of the interior inthe 458 is not as good as the interior in the other cars and i dont like the steering wheel in the 458, so was thinking to simply copy the interior (steering wheel from the 430)...

Any ideas if this is easy?