I loaded all the required mods for this and played mincraft before adding IC. It worked just fine. Then, I added IC and minecraft crashes with this error report:
Mods loaded: 6
ModLoader 1.0.0
mod_TooManyItems 1.0.0 2011-11-29
mod_ModLoaderMp 1.0.0
mod_ReiMinimap v2.9 [1.0.0]
mod_IC2 v1.42
mod_Millenaire 2.0.7
Minecraft has crashed!
----------------------
Minecraft has stopped running because it encountered a problem.
If you wish to report this, please copy this entire text and email it to support@mojang.com.
Please include a description of what you did when the error occured.
--- BEGIN ERROR REPORT eb6ff598 --------
Generated 12/20/11 1:56 AM
Minecraft: Minecraft 1.0.0
OS: Windows XP (x86) version 5.1
Java: 1.6.0_29, Sun Microsystems Inc.
VM: Java HotSpot(TM) Client VM (mixed mode, sharing), Sun Microsystems Inc.
LWJGL: 2.4.2
OpenGL: GeForce 6200/AGP/SSE2 version 2.1.2, NVIDIA Corporation
java.lang.RuntimeException: IndustrialCraft 2: MinecraftForge Too Old, need at least 1.2.2
at forge.MinecraftForge.killMinecraft(MinecraftForge.java:322)
at forge.MinecraftForge.versionDetect(MinecraftForge.java:342)
at mod_IC2.initialize(mod_IC2.java:271)
at ic2.platform.Ic2.load(Ic2.java:64)
at ModLoader.init(ModLoader.java:830)
at ModLoader.AddAllRenderers(ModLoader.java:186)
at wb.<init>(wb.java:76)
at wb.<clinit>(wb.java:9)
at net.minecraft.client.Minecraft.a(SourceFile:265)
at net.minecraft.client.Minecraft.run(SourceFile:644)
at java.lang.Thread.run(Unknown Source)
--- END ERROR REPORT 344f6efb ----------