File Type Association for new Users

Hi.

The issue is quite simple and I don't know why Microsoft gives nothing for this.

I have Remote Desktop Session Host and RemoteApp. My users start Application via RemoteApp. They need to open JPG or TIFF file in this Application. There is graphic view application on the server. But I can not set File Type Association for this files. GPO (Folder OPtions) - Result: Success, but doesn't work. CMD "ASSOC" and "FTYPE" Success but also have no effect.

So the question is "How to set file type association on RDP Server 2012?".

I suggest to use default profile. I mean, every time new user logs on server, new profile is created and system takes basic default association. Do you know, where it is?