Originally Posted by Harick

here you go

if you want more or less space between the messages, just edit this margin-top in MessagingWidgetsSMSConversation.css

Code:

div.Message {        
  clear: both; 
  margin-top: 10px;
}

higher value means more space while lower means less space


EDIT.: sorry, i didn't notice the empty spaces, i will upload a fix when i find what it is