opening and running macros in an Excel file in a new instance of Excel
 

I want to run the macros in one of my Excel files completely independently of any other Excel files which may be open.

I can open my file in a new instance of Excel by using the /e switch in a command line but I can't work out how to stop any Excel files opened subsequently opening in that new instance of Excel.

I wonder if I have explained this clearly enough and whether anyone can give me some guidance?

Many thanks

Malone