croduh, despite the harsh comments Nhawk and Ghost are both right.
What you've done would fall under the "user MOD" cataegory, since technically, what you've done is not build a new terrain with custom textures, but rather change the basic texture content of the game - thus, having a global effect in game.
If there's an alternative, I think what you should do is send these texture files to HTC to be used as the new "default" texture for the game. I've seen what you've done before you took the pic link down, and I must say they are quite impressive.
I'm sure if HTC feels that you've done a good job, they might actually take in your texture files to be used as a new basis for *.std files in future patches.
So, send HTC a sorry note, and then send them your works.