I'm also brand new to Macs, and lack of PgUp/PgDn/Home/End has been one of my major frustrations. But I'm learning new tricks every day! I find that not all keyboard shortcuts work the same way in all applications. E.g. Fcn-L/R arrow works in some, but not others. In Word, I just now(!) learned (learning by playing around) that Home is Fcn-Opt-UpArrow (End the same with - of course - the DownArrow), Fcn-Up/Fcn-Down is the equivalent to PgUp/PgDown. But these keys and key combos work somewhat differently in other applications. At first I was frustrated by not being able to do some things the way I'm used to, but gradually as I'm actually using the machine to do Real Work and play around a bit, I'm learning that for most things (still struggling with some other)there are slightly different but just at good ways to get the same things done.