How to disable OS X startup sound?

[Let's Sekuhara!]

Every time I boot up my MacBook it makes its trademark startup sound.

The problem is that it does this even when the volume is muted and headphones are plugged in!
I can't turn on my Mac late at night without waking up my girlfriend.
What is the recommended way turn this off or at least lower the volume significantly? I found this link in an older thread:

http://www5e.biglobe.ne.jp/~arcana/StartupSound/index.en.html

I just wanted to make sure that this is indeed the only way before I go messing with a third-party app that changes my startup settings and may or may not be Leopard-compatible.

Thanks.

 

[Schtumple]

You'll be fine.

 

[flopticalcube]

I use that prefPane. No problems at all.

 

[michael.lauden]

you could google..

http://www.macosxhints.com/article.php?story=20070223093835709

 

[OldManJimbo]

Choices

If I had a woman who became upset with the Mac BONG, I'd seriously think about finding a new woman. A man must have his priorities in line. Do you want some occasional nookie, or a Mac?

Of course, you could switch to a PC. Then you could use a computer and get screwed at the same time