If you want to use any of the alternative textures, move the ones you want overwritten (for example, dirt) to the /textures/blocks folder. If it asks you to overwrite, say 'yes'.

If you are running Minecraft v1.4.7, copy the texture you want, and paste it into it's proper location in terrain.png.

Thank you for downloading Alice!

Note: These contain detail variation, color changes, and generally silly things.