So, it's possible or impossible? (that thread is very outdated (2009))
http://www.ownedcore.com/forums/world-of-warcraft/world-of-warcraft-model-editing/260505-tech-showoff-different-water-vertex-shading.htmlYou can get quite a similar replication to that of post-WOTLK water graphics, however it is by no means easy and there is no tutorial for it.
And how?
as Steff said: Schlumpf did nothing. only dbc
Copying the DBC does nothing, so no, that won't result in anything. The easiest and most reliable way to fake it is by using plain-blue water BLPs instead of the normal ones. People did that for years now. Getting the correct water is not really possible without binary modifications though. I did not simply edit the DBC back then.