8300 Shortcuts: Home Screen Shortcuts - BlackBerryFAQ
Requires that you have Dial from Homescreen disabled at Phone Dialer > Options > General Options.
You can press the GREEN key on your BB to get to the phone, then the menu key to open the menu, O for options > ENTER to select > ENTER again to select General Options > continue to press ENTER to scroll down the items until come to Dial from Homescreen, then press ALT to show the YES or NO options and space bar to switch between the two, you want NO.
Then save. And use the short cuts as described in the link.