This MOD adds 2 new fields to the CP Database that allow you to SORT the ExtraPages list.
Normally, the pages display in the order that they were entered. (ID)
Now this might be fine if you have 2 or 3 pages, but to take full advantage of the new EXTRAPAGES feature added by CP, you will probably be adding many more pages than that.
This is where the MOD comes into its own.
Once applied you can sort your pages in any order you wish.
HINT:
Instead of starting the sort at page 1, 2, 3, 4 etc which is what you would do logically.
Try starting at say 100 or 1000 and go up by 10's.
This will give you some room to move when you need to add new pages.
The reason for this is behine the way computers count, if you went 1, 10, 20, 30 etc, you may not get the results you desire.
So keep them in block order ... 100, 110, 120, 130, 140 etc and all will be fine