Adds a Craftable ROBOT to the game that shoots arrows at your enemies. (It works like a wolf/snowman if u hit a monster the Robot finishes him). You have to make 2 "Mech" Blocks and 1 "Head" block. When it dies (has 15 health) it drops around 8 Iron Ingots. It also leaves a "Redstone Trail". Thanks to jackattack4000 for the idea :)
[UPDATE v2] - Added Laser Robots that shoot lasers :P

PS: It's only 50% done because I might add more stuff. Like lazors. Also I want to change the model UNLESS you think it's ok :)
PPS: They DIE in water :)
PPPS: You can just craft a "Head" and use it like a torch. Because Heads give off light :D

Crafting Recipes =

HEAD -
Iron Stick Iron
R. Stone Iron R.Stone

MECH -
Iron Iron Iron
Iron R. Stone Iron

LASER MECH -
Iron Iron Iron
Iron R.Stone Iron
R.Stone R.Stone R.Stone

*Just put a "head" on top of two "mech"s to make the robot work :)

New Update Coming VERY Soon with an Achievement and The Blocks in Creative :P

WINDOWS
1) Open up %appdata%, if you don't know how to do this, start>run, then type in %appdata%
2) Browse to .minecraft/bin
3) Open up minecraft.jar with WinRAR or 7zip.
4) Drag and drop the necessary files into the jar.
5) Delete the META-INF folder in the jar.
6) Run Minecraft, enjoy!

MAC
1) Go to Applications>Utilities and open terminal.
2) Type in the following, line by line:cd ~mkdir mctmpcd mctmpjar xf ~/Library/Application Support/minecraft/bin/minecraft.jar
3) Outside of terminal, copy all the files and folders into the mctmp directory.
4) Back inside terminal, type in the following:rm META-INF/MOJANG_C.*jar uf ~/Library/Application Support/minecraft/bin/minecraft.jar ./cd ..rm -rf mctmp
5) Run Minecraft, enjoy!