you need a 17mm wrench or socket, depending how much you like to hurt yourself.
i wouldnt say an hour, but maybe if youve never done it before.
its a cylinder, about 3 inches long, maybe 1.5-2 inches wide, got fuel line on both ends, and its right where silvermk2 said it would be.
basically find the black bar that supports the intake manifold, and look to the rear of it, there should be a bracket with two 12 or 14 mm bolts holding the filter on.
id recommend removing the fuel pump fuse and starting the engine to burn the fuel outa the system as best i could, then loosen both 17mm bolts holding the fuel lines on, then and only then, removing the bracket.
i figure if your mechanically inclined you should be able to get it done in 30-45 minutes.