CLIENT

BEFORE :

For minecraft 1.2.5 :
Install ModLoader
Install ModLoaderMP
Install GUI API

AFTER :

Install ExtraMobs :

Put Resources and Config folders in your .minecraft folder.
Unzip ExtraMobs-1.0.2-Client.zip folder and put the content in .minecraft/bin/minecraft.jar
Delete META-INF folder in .minecraft/bin/minecraft.jar if it exists.

Enjoy !

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SERVER

BEFORE :

For minecraft 1.2.5 :
Install ModLoaderMP

AFTER :

Install ExtraMobs :

Put Server_Config folder in your server folder (same folder as your server_minecraft.jar)
Unzip ExtraMobs-1.0.2-Server.zip folder and put the content in server_minecraft.jar
Delete META-INF folder in server_minecraft.jar if it exists.

Enjoy Together !

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18/04/2012
ExtraMobs by Budd.