Linked Parameters: Modify in MEP Model



I think that I no the answer, but is there any way to modify a parameter of a linked model?

For example, I linked an architectural model to a mechanical model. I want to combine two spaces into one. The simplest way that I know of is to go into the architectural model and just select the walls dividing the two spaces and deselect room bounding. I also have used dynamo to select the desired walls to be turned off and use SetParameterByName to turn room bounding on or off.

I want to know if I could do the same type of thing in my mechanical model without changing it in the architectural model. I can get the elements from the linked model using GetFromLinkedFile and GetParameterValueByName and see if room bounding is turned on or off, but I cannot edit it.