gain access to a model

Hi,

I have been ask to take a look at a MDS setup that a contractor has setup but has left the firm, I have full access to the site as I created it how ever the models that the contractor created I can't seem to gain access to to allow others to make changes.

I can confirm they have been created as I can see in the tblmodel they are listed.

Is there a why to change the model admin for a model that I don't have access to (so can't see in the web UI).