Wirelessly posted (BB 9930t: Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.0) BlackBerry8100/4.2.1 Profile/MIDP-2.0 Configuration/CLDC-1.1 VendorID/100)
Install Desktop Manager.
You need to download the entire Operating System package and install it to your pc along with Desktop Manager.
Then plug in the BB and use Application Loader to install it.
BB Messenger is included with the OS. Package. The OS package is not on the CD. Get it dom your carriers website or search the forums for it. I'm mobille or I'd post a link.