Registry changes

[kcaegis45]

I have the Sprint Touch and I had a bunch of registry changes.
Now I am not sure if it was the registry changes or cab I installed or it's the way the Touch came.
1) If I did a hard reset, will all the registry changes go back to factory settings?
2) Could a cab file change the .brn file for good and will not go back to factory settings even with a hard reset?
3) I loaded the yellow quick launcher, did the stock touch come with the yellow icons cause after I remove the program it's still yellow but when I play a media hub item, the playing icons are blue, the Sprint TV icon is the picture icon and the ondemand icon is the file icon (picture of a reel).

I am total confused on how it should be and if the yellow Quick Launcher by JUVS changed the .brn files for good.

Help...