Can't move the Background layer? That's because back in Photoshop 6.0, Adobe locked the Background layer from movement. That wouldn't be so bad, except that if you look at the top of the Layers palette, you can see that "Yup, the checkbox to lock movement is turned on," but the frustrating part is that it's also grayed out, so you can't simply uncheck it to unlock it. The only way around this is to double-click on the Background, which brings up the New Layer dialog. Click OK, and your Background layer becomes Layer 0 and is unlocked. Now you can move it.