Hellooooo my fellow Minecrafters!! Milkman here presenting you this special mod called Player API, So what is it you ask? Well to explain Player API is this mod which is an API which gives mods access to the EntityPlayer class while minimizing conflicts between mods. So it prevents errors when your installing various mods such as the Aether, Combat++, Moods, Single Player Commands, ShockAhPI, Skills API, SkyrimCraft, or the Planes Mod.
Credits to Jamioflan for making this mod and preventing most conflicts with Minecraft 
How to install Player API for Minecraft 1.2.5
- Download the Player API mod
- Go to the appdata folder and navigate to .minecraft/bin
- Open minecraft.jar in WinZIP, WinRAR or 7zip
- Drag the three class files from Player API into the minecraft.jar
- Delete the META-INF folder if you haven’t already
- Done!!! Have fun modding with less conflicts
