I kept this full size for illistration purposes it might take a while to load.

Here you see a screen shot of an Acro game I scavenged off my hard drive. It appears inside IceView so it's really a Screenshot of IceView holding a screenshot.

To get your Screenshot into ICE your path would have been Edit/Paste after hitting PrintScreen to snap it.

I have it set up as if I were to Crop an Acro out of the Group, you can see the Path...
Edit/Select Region/Rectangle.

Observe the + - buttons on the toolbar. You can use these to zoom in and out fast and enlarge your shot for a cleaner cut.