GUI Minimap

Hi, I have a minimap done with a second camera and it goes smaller and bigger when ever the screen changes size. How can I do it so it does not change size?

Also how can i add a border to it?

Any answers would be Nice thanks.

Just a third Question, any idea of a Install Builder for pc and mac?

Sounds to me like the size of the minimap in your GUI is dependent on the screensize. Maybe you can make the size absolute in pixels?