Hey, Thefish561 - did you ever get what you needed? If you still need the original codeplug for the 996xt, I have it on a FreeSCAN (.996) file. Email me at 4adam58 (at) john98225.com and I'll send it to you.
I saved my personal configuration, etc., initialized the memory, loaded the original Uniden goodies, and saved it as a .996 file in FreeSCAN. Then, from within FreeSCAN, I copied one of the systems to the clipboard, cleared everything, reloaded my original .996 file, and pasted the new system into it. It worked fine. You probably already did something similiar, but just in case you haven't, that's all you have to do. Or, like I said, email me and I'll send you the original Uniden codeplug.