Can anyone explain how to use the Handcent SMS for the Sensation? I have installed it and assigned different notifications for my contacts. But when I get a message from them,instead of playing their sound, it plays the one for the original message app. that came on the phone. I also get two messages from the same person. One on the Handcent app. and one from the message app. that came with the phone. Is there anyway to disable or bypass the original message app. and just go with Handcent app? Thanks for any help you may have.