I figured out how to get threaded text messages on your Blackjack.

1) Go to microsoft to download and install Microsoft.net Framework Version 2.0. http://www.microsoft.com/downloads/details.aspx?FamilyID=7abd8c8f-287e-4c7e-9a4a-a4ecff40fc8e&DisplayLang=en

2) Download txt man or Sms threader and install. I'm using Sms threader now. I like it better than txt man because it is much easier to change colors and fonts. I got my Sms threader from this site http://sms-threader.en.softonic.com/ie/55836