From my work in progress pack:
http://i.imgur.com/5MbAetH.png
Mossy cobble stone is ID 48 and regular cobblestone is 4. Would it somehow be possible to connect both textures using the CTM properties present in MCpatcher and Optifine? In that same picture you can see I managed to do basic CTM with the wool blocks. While we're at it I might as well ask for oppinions on the texture of the cobble itself.