Here's another idea - check the online help system on the 8130 itself. In the past (again; all pre version 4.3) there is a section on how to dial letters on the keyboard. Check in there also.
Edit: From the Help file on the PC that is installed when you install the 8130 Handheld code...
Dial using numbers or letters
When you type a letter in a phone number, your BlackBerry® device dials the number that is associated with the letter on a conventional phone keypad.
To type a number, press a number key.
To type the first letter on a key, hold the Alt key. Press the letter key once.
To type the second letter on a key, hold the Alt key. Press the letter key twice.
Dead horse beaten