Open the stock SMS app, go to Menu->Settings.... Uncheck the Use The Volume Key. Open the Background Style and choose your SMS template desire. Hit SAVE at the top under the notification bar. Open Bubble Style. Choose the two conversation styles you desire (yours and theirs)... Don't forget to choose SAVE at the top under the notification bar. That should lock down your SMS texting. Remember, MMS might alter things based on your recipients stuff.
ULTIME DA CCM