1) Get cleen minecraft (no mods at all)
2) Delete META-INF
3) Download and Install ModLoader (then run Minecraft)
4) Download and Install ModLoaderMP (then run Minecraft)
5) Download and Install AudioMod (then run Minecraft)
6) Download IceAge mod
7) Extract the .zip folder
8) Put all files from 'place in minecraft dot jar' in minecraft.jar
9) Pu all files from 'place in .minecraft' in .minecraft folder
10) Run Minecraft