Settings on Blackberry Smartphone

[Chrislong]

Hi guys,
I know many of you will have a Blackberry by now, I haven't, but my girlfriend has just gone one.

She wants to change the message tone on it, and neither of us can find how. We have tried navigating through it, the manual, and the internet manual. Can't find how anywhere.

Its a Blackberry Bold 9000 Smartphone.

How do you guys do it? even if it ain't the same model any tips appreciated, thanks.