Ok here's what I need help with. I'm trying to get an internship for an advertising company and he wants to asses my abilities. He wants a 8 feet by 16 feet billboard with some advertisement on it. He wants no pixelation for the printing, how do I get the 8 feet by 16 feet billboard to work in photoshop. I tried the obvious way of just putting in the numbers and the file was over 4GB and my iBook can't handle anything like that. So, what do I do?