You are right. A simple shortcut does not work. I removed the folder and added a link named Purchases in that folder, only to find Poser bypass that and make a new 'purchases' folder. Same happened wirh a link named 'Runtime'.

There are ways to set the spoofing deeper, at a level not normally detectble by applications. Not sure if you wan to go that far.

It is maybe better to let Poser have its ways and keep that 'purchases' folder as a sandbox. This means you can remove any reduntant crap and move files about as you see fit, then just move the Runtime to merge with the Runtime where you want the content.