Instructions
Pack Creation
Visit the painterly pack website at http://painterlypack.net/.
Click the "Create" image button.
Choose from the lists which textures you would like to include in your custom painterly pack. Click the radio button to the left of each texture image.
Click "Create My Painterly Pack!" at the bottom of the page and then download the ZIP archive to your hard drive.
Installation
Launch "Minecraft" and log in with your name and password.
Click "Mods and Texture Packs" from the main menu.
Click "Open Texture Pack Folder" to open the texture pack directory in Windows Explorer.
Move the ZIP archive containing your customized painterly pack into this directory. Do not extract the files from the archive.
Return to the "Minecraft" texture pack menu and select the pack matching the name of your ZIP archive. Click "Done."