How Do I Get The Textmessage Group Theme Like The Iphone On My Blackberry Curve

My friend has an iphone. I didn't get one because me and touch screen don't mix. However, she has this text messaging feature on her phone that I love. It groups textmessages by contact in cute little talk bubbles. Does anyone know what I mean and know if there is an app that I can download to get that feature on my curve?