Using right/left/up/down keys with Fn key can do the same as page down / page up / home / end on a PC.
Some mentioned about using right/left/up/down keys with either option or command key in http://www.apple.com/shop/question/answers/mac/how-can-i-make-the-home-and-end-keys-on-the-apple-extended-keyboard-work-as-line-commands-rather-than-page-commands/Q7HY7K2UFDTUK7J7C . What do they mean under OS X?
Thanks.