For those looking for a free ware water package to improve the look the FS9 water, check out r_water0.zip. It is by a guy named Roger. I found the package on Flightsim.com I do believe. I made a back up of my World/Texture folder, then dropped the files in the r_water0.zip package into place.
The water is darker, bluer...not that pale turquoise look of the stock files. A great improvement over the stock files.
This package, according to the read me file, will only work with the stock water files.