If you mean that you want to change the interior view for some cabs then the answer is yes! You have to do it through changing the config. file by substituting the kuid of the exisiting interior with the one that you want to change to. Of course this assumes that the two are compatible for attachment points etc but you quickly find this out with the result you get! By that I mean that some will fit and others will not and built-in stuff isn't readily changeable.
Hope this helps.
Cheers
Russell