you can go in to the application tray(middle button to see all apps) hit the menu button and then press move item. You can then take handcent and place it on top of the messaging app. And then your set the stock messaging app is off the bottom bar and handcent is in its place. You can rearange all the apps like that. Also you can create categories and put apps in different places instead of Applications and Downloads. I created a messaging category for KIK,Whatsapp and pingchat.
Hope this helps.