This is going to take a little longer than I expected... My image is the same pixel length/width of the original apple file, however it seems to take up just a wee bit too much space horizontally... I'll update this post with footage as soon as I can fix this.
[Edit] I'm still having some difficulty... upon doing some more investigation into the iPhone imagery structure, I believe that it makes more sense to replace the telephone UI slide background, as it is the same used by the lockscreen... This brings me to wonder about the devicelockbottombarbackground.png redundancy...
[Edit 2] This is my dilemma...
From this:

To this:
