Other Language - Working with Xcode and Interface Builder

I'm currently starting to develop a user interface with Xcode and Interface Builder. The problem that I am having is when the user wants to resize the window. I can set the window to a minimum size, but when the user makes the window larger, my background graphic and icons move out of sync with each other. My intention is to have a set of icons that rest atop a specific position on a background graphic. The user can resize the window as he/she sees fit, but I want the icons to remain in the same position on my graphic. The easiest solution is to make the window a fixed sized that can't be changed, but is there a way to tether a specific point on my icon to a specific point on my background graphic? Any help would be awesome.