So i want to replace the usage of a texture with another. I dont mean create a new texture in photoshop and sav it over another. I mean, say ive textured so much of the landscape with 1 texture, but i want to swap its usage for another texture. How would i go about doing that?

Can i do it with the Enchanted Editor?

The texture i want to swap is "GL_Dirtscrub", i want to swap it with my own leaving the original intact in the editor.

Anyone know how this would be done?

If you can get your head round regular expresions then http://code.google.com/p/mlox/wiki/Tes3cmd#modify_-_Powerful_batch_record_modification_via_user_code_extens's --replace switch might do it