1. Download
http://www.minecraftforum.net/topic/72747-faithful-32x32-pack-update18-support-18/ For the texture pack and save it on desktop
2. Download MCPatcher Here
http://adf.ly/2hP31 and save it on desktop
3. Open It and Go under "Mods" and take "Better Grass" off and then Patch it
4. go in to ur "START" Menu and write "%appdata%" and Click Enter
5. Go in to a Folder named .minecraft and then there should be a folder Named texture packs
6. now just take the texture pack and drag it in to the Texture pack folder
7. Start Minecraft and then go Under "Mods and Texture Packs" and then click ur Tecture pack and Voila !