http://www.mediafire.com/?z2j9zdw314r9lw4
part of my quest to tell the rivers apart, i decided they blended with the background too much, and it was hard to tell when the sizes changed.
So i saturated the rivers about 15%, and changed the colors, streams are more greenish and major rivers more blue, progressively.
( Please not these screenshots also have my hex shader mod which is separate mod and compatible, you can also download here if you want http://www.mediafire.com/?ij9cu7to3eta4p4 )
Before

After

Download link for River mod
http://www.mediafire.com/?z2j9zdw314r9lw4

