I want to write an application where I have a list of path names to particular files stored in Photoshop or 3dstudio. This list of these are displayed on the screen and I want to click on one of them and have it open the document in an already open copy of the target application. i.e. I have a JPG in My documents and already have open Photoshop, so when I click on the document I want it to open it in that instance of Photoshop. How?