Try to take a clean minecraft.jar (it should contain all required classes) and install forge and jar mods again. Probably you deleted it at some point.
Hey! There we go! That fixed it. I should have thought of that. I did delete it but I have no idea how. 
Anyway thanks for the help! 
(As you can tell I really love the smileys on this forum)
Why do you have no paulscode/sound/SoundSystem class? Do you use any modified soundsystem?i'
I don't think so.. I had to disable sounds in all my mods though 
How does one reacquire a SoundSystem class? Sorry I'm still learning all these things. I'm a little new to modding.
Please give me your crash log. I really want to understand what can cause to crash in my addon.
I think it is the last error that does it. EnderStorage works perfectly well along with ExtraBiomes when I don't have Nuclear Control installed.
7/21/12 3:18:21.173 PM [0x0-0x81b81b].com.Mojang Specifications.Minecraft.Minecraft: CONFLICT @ -5 item slot already occupied by vd@5ec22978 while adding codechicken.enderstorage.ItemEnderChest@1d30b5e2
7/21/12 3:18:21.516 PM [0x0-0x81b81b].com.Mojang Specifications.Minecraft.Minecraft: ExtraBiomes XL: MinecraftForge minor version mismatch, expecting 3.2.x, may lead to unexpected behavior
7/21/12 3:18:22.321 PM [0x0-0x81b81b].com.Mojang Specifications.Minecraft.Minecraft: Exception in thread "Minecraft main thread" java.lang.NoClassDefFoundError: Lpaulscode/sound/SoundSystem;
block id 192
item id 31000-31008
Sample config:
Yup... I've fiddled around with it and I'm pretty sure it's something with the sounds. I don't know why but sounds just break stuff on my minecraft client when I don't disable it. Just maybe put it on your list that if you ever have some free time to maybe add an EnableSounds = TRUE ; on your config. Thanks for the help man, but I guess I'll just have to make my reactor run on a redstone timer or something. 
Okay. Still not working out Since I cannot access the IC2NuclearControl.cfg file I was wondering if you could give me a quick list of the block ids used in it so that I can check all of my other mods for conflicts manually. Thanks Shedar for your superior mod support. I really appreciate it 
Love the mod and I'm planning on running an unstable Mark III reactor so I'm anticipating really needing this mod Having a little trouble with installation. I need to disable ic2 sounds on my mac for ic2 to work, and that is also the problem with this mod. But my IC2_control.cfg config file is generating empty so I cannot do anything about that 
Any recomendations? ( I can't really get you an error log because my minecraft launcher freezes on the white Mojang screen ) 
