The title really says it all. i have followed installation instructions, and as i log into minecraft all i see is MOJANG and then a black screen that doesnt go away. Any help would be massively appreciated 
Log: C:\Users\Greg\Desktop>"C:\Program Files/Java/jre7/bin/java" -Xms1G -Xmx1G -cp Mi
necraft.exe net.minecraft.LauncherFrame 1>log.txt
2013-01-25 19:53:29 [INFO] [ForgeModLoader] Forge Mod Loader version 4.7.4.520 f
or Minecraft 1.4.7 loading
2013-01-25 19:53:29 [SEVERE] [ForgeModLoader] FML appears to be missing any sign
ature data. This is not a good thing
2013-01-25 19:53:30 [INFO] [STDOUT] 27 achievements
2013-01-25 19:53:30 [INFO] [STDOUT] 210 recipes
2013-01-25 19:53:30 [INFO] [STDOUT] Setting user: pujolsfan12, -7493222438926158
822
2013-01-25 19:53:30 [INFO] [STDOUT] LWJGL Version: 2.4.2
2013-01-25 19:53:30 [INFO] [ForgeModLoader] Attempting early MinecraftForge init
ialization
2013-01-25 19:53:30 [INFO] [STDOUT] MinecraftForge v6.6.0.497 Initialized
2013-01-25 19:53:30 [INFO] [ForgeModLoader] MinecraftForge v6.6.0.497 Initialize
d
2013-01-25 19:53:30 [INFO] [STDOUT] Replaced 84 ore recipies
2013-01-25 19:53:30 [INFO] [ForgeModLoader] Completed early MinecraftForge initi
alization
2013-01-25 19:53:30 [INFO] [ForgeModLoader] Searching C:\Users\Greg\AppData\Roam
ing\.minecraft\mods for mods
2013-01-25 19:53:31 [INFO] [ForgeModLoader] Forge Mod Loader has identified 4 mo
ds to load
2013-01-25 19:53:31 [INFO] [STDERR] Exception in thread "Minecraft main thread"
java.lang.VerifyError: (class: ic2/common/IC2, method: registerCraftingRecipes s
ignature: ()V) Incompatible argument to function
2013-01-25 19:53:31 [INFO] [STDERR] at java.lang.Class.forName0(Native Metho
d)
2013-01-25 19:53:31 [INFO] [STDERR] at java.lang.Class.forName(Unknown Sourc
e)
2013-01-25 19:53:31 [INFO] [STDERR] at cpw.mods.fml.common.FMLModContainer.c
onstructMod(FMLModContainer.java:416)
2013-01-25 19:53:31 [INFO] [STDERR] at sun.reflect.NativeMethodAccessorImpl.
invoke0(Native Method)
2013-01-25 19:53:31 [INFO] [STDERR] at sun.reflect.NativeMethodAccessorImpl.
invoke(Unknown Source)
2013-01-25 19:53:31 [INFO] [STDERR] at sun.reflect.DelegatingMethodAccessorI
mpl.invoke(Unknown Source)
2013-01-25 19:53:31 [INFO] [STDERR] at java.lang.reflect.Method.invoke(Unkno
wn Source)
2013-01-25 19:53:31 [INFO] [STDERR] at com.google.common.eventbus.EventHandl
er.handleEvent(EventHandler.java:69)
2013-01-25 19:53:31 [INFO] [STDERR] at com.google.common.eventbus.Synchroniz
edEventHandler.handleEvent(SynchronizedEventHandler.java:45)
2013-01-25 19:53:31 [INFO] [STDERR] at com.google.common.eventbus.EventBus.d
ispatch(EventBus.java:317)
2013-01-25 19:53:31 [INFO] [STDERR] at com.google.common.eventbus.EventBus.d
ispatchQueuedEvents(EventBus.java:300)
2013-01-25 19:53:31 [INFO] [STDERR] at com.google.common.eventbus.EventBus.p
ost(EventBus.java:268)
2013-01-25 19:53:31 [INFO] [STDERR] at cpw.mods.fml.common.LoadController.pr
opogateStateMessage(LoadController.java:140)
2013-01-25 19:53:31 [INFO] [STDERR] at sun.reflect.NativeMethodAccessorImpl.
invoke0(Native Method)
2013-01-25 19:53:31 [INFO] [STDERR] at sun.reflect.NativeMethodAccessorImpl.
invoke(Unknown Source)
2013-01-25 19:53:31 [INFO] [STDERR] at sun.reflect.DelegatingMethodAccessorI
mpl.invoke(Unknown Source)
2013-01-25 19:53:31 [INFO] [STDERR] at java.lang.reflect.Method.invoke(Unkno
wn Source)
2013-01-25 19:53:31 [INFO] [STDERR] at com.google.common.eventbus.EventHandl
er.handleEvent(EventHandler.java:69)
2013-01-25 19:53:31 [INFO] [STDERR] at com.google.common.eventbus.Synchroniz
edEventHandler.handleEvent(SynchronizedEventHandler.java:45)
2013-01-25 19:53:31 [INFO] [STDERR] at com.google.common.eventbus.EventBus.d
ispatch(EventBus.java:317)
2013-01-25 19:53:31 [INFO] [STDERR] at com.google.common.eventbus.EventBus.d
ispatchQueuedEvents(EventBus.java:300)
2013-01-25 19:53:31 [INFO] [STDERR] at com.google.common.eventbus.EventBus.p
ost(EventBus.java:268)
2013-01-25 19:53:31 [INFO] [STDERR] at cpw.mods.fml.common.LoadController.di
stributeStateMessage(LoadController.java:83)
2013-01-25 19:53:31 [INFO] [STDERR] at cpw.mods.fml.common.Loader.loadMods(L
oader.java:479)
2013-01-25 19:53:31 [INFO] [STDERR] at cpw.mods.fml.client.FMLClientHandler.
beginMinecraftLoading(FMLClientHandler.java:161)
2013-01-25 19:53:31 [INFO] [STDERR] at net.minecraft.client.Minecraft.a(Mine
craft.java:410)
2013-01-25 19:53:31 [INFO] [STDERR] at asq.a(SourceFile:56)
2013-01-25 19:53:31 [INFO] [STDERR] at net.minecraft.client.Minecraft.run(Mi
necraft.java:744)
2013-01-25 19:53:31 [INFO] [STDERR] at java.lang.Thread.run(Unknown Source)
