The trick is to create a component family of the item you want to array with the parametric values you would like to control, pay attention to what you name the parametric values and do not create any 'family types'. Then import that family (it becomes a nested family) into the family where it will be arrayed. At this point you will create the same parameters as the nested family (make sure the original values are the same to avoid error messages). Once this is done place the component and using the element properties dialog box select edit/new. From this box you will click on the grey boxes on the right of the parameters you have created and link them to the parameters (same name) in the host family which should show up in a new dialog box of their own. Close out of this and adjust the parameters in the 'family types' to see if you have done it correctly. If you get lost along the way, the nested families and linking parameters sections in the revit help file is pretty good at explaining it. You will also want to utilize reference lines. I am enclosing a Folding Panel Partition that I created, I hope it comes through. I'm not sure if you have to have the shared panel file but I sent it anyway.
Good Luck,
Laura B