This week's book giveaway is in the OCAJP 8 forum. We're giving away four copies of OCA Java SE 8 Programmer I Study Guide and have Edward Finegan & Robert Liguori on-line! See this thread for details.
on XP Right Click MyComputer > Properties > Advanced Tab > Environment Variables > under user Variables section, add or edit PATH > with the location of the install c:\program files\java\jdk1.5.0_6\bin\. That should be it.