There is no such animal from Uniden for the XT scanners. However,
FreeScan is a very well supported freeware package that will handle the 996XT. The user's guide for this software is
here
If you are totally new to this world, I would read up on some of the links that are shown in the wiki homepage. Just go to the blue toolbar under the Scanner Master ad, float your mouse over
Wiki and click on
Wiki Homepage. Reading up on Trunking Basics in the newcomer's area, and the first couple of topics - defining what DMA is, and how systems, sites and groups relate to one another - in the Uniden DMA FAQ (in the popular topics area) will get you started.
73 Mike