Press menu (to the left of the trackball) and choose "edit".
Scroll through and change away!
Before you change too much you should search for and read the thread entitled, "Ever been embarrassed by your ringtone?" Ha ha!!
Welcome to Blackberry, Crackberry.com and Pearl! I too have a Pearl (Pearly) and I have found Crackberry.com to be THE single most useful site on the web! Its awesome!
Check out shop.Crackberry.com for some awesome accessories and applications!
See ya 'round the board!
Posted from my CrackBerry at wapforums.crackberry.com
go to profiles, scroll down to advanced, clock menu and new profile, scroll down to phone and click it and then BOOM you are now at the menu to change everything! same thing if you want to change your text/sms noise :-)