Need some help please

I recently got premiere pro and After effects 7, but don't really understand how to use them yet apart from drag in clips and images. I need to do like a 'pan' effect across a still image, the screen starts on one area then pans across and finishes at another bit, I've been searching for ages for a guide how to do this :S I dont know if its even called that or which of my programs to use to do it! anyway help would be appreciated thanks