I think if you just follow along with this thread it's all gonna get covered.
The steps are pretty simple :
1. Make sure all the speakers are actually working, ie that you get some "proper audio content" (ie not just noise or hum) coming out of each speaker.
2. Read the manual enough to understand how to manually adjust speaker levels using the remote. You just need to know how to move the levels up and down, not how to find the right level.
3. Buy or borrow a setup disk (per the links from Ajax above) and an SPL meter (normally from Radio Shack). The advantage of borrowing is that the person you borrow from will probably help you with the setup
4. Play the disk, and jump to the section where they talk about setting audio levels. The disk will play a series of tones out of the different speakers -- you will sit in your normal listening position, watch the SPL meter as the tones play, and probably see that each speaker is playing at a different level.
5. using the receiver remote, adjust the louder speakers down and the quieter speakers up until the tones are all playing at about the same volume. If you run out of adjustment on the sub remember that it has a level control for coarse adjustments.
6. Enjoy.
