I created a quick guide how to use bump maps in mapping. It is a step by step guide for beginners on this subject. When you have gone through this guide you know enough to start experimenting more.
Let me know if you have hard times with any of the steps or have any other comments.
EDIT (12-Dec): Added many new things to the tutorial and uploaded the newest version 1.1.
EDIT (13-Dec): Minor corrections - new version 1.1a