I found the solution here. Thought I would share it with anyone else who needs it...
"Just install crunchSMS on your BlackBerry and then go to options > security options > firewall > then check the SMS box and save your settings. This will block SMS messages from going into the SMS & MMS application but crunchSMS will still pick them up and handle them. From there just move crunchSMS’s icon to your home screen or a convenience key (if that’s what you fancy) and treat it like you would your normal SMS inbox."
Last edited by Joe Jerde; 06-21-2010 at 10:25 AM.
Reason: omitted link, posted info