SvEgiiVEteR I ran the bat you posted and replace you username for mine and when I crashed I got the same error log only I Have some more mods installed.
Mods loaded: 11
ModLoader Beta 1.8.1
mod_IC2_AdvMachine v2.00
mod_IC2_AdvGenerators 1.8_01
mod_BuildCraftCore 2.2.5
mod_BuildCraftBuilders 2.2.5
mod_BuildCraftEnergy 2.2.5
mod_BuildCraftFactory 2.2.5
mod_BuildCraftTransport 2.2.5
mod_CraftGuide 1.2.2
mod_IC2 v1.23
mod_TooManyItems 1.8.1 2011-09-27
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 54156caa --------
Generated 27/11/11 11:37 AM
Minecraft: Minecraft Beta 1.8.1
OS: Windows 7 (amd64) version 6.1
Java: 1.7.0, Oracle Corporation
VM: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Oracle Corporation
LWJGL: 2.4.2
OpenGL: Radeon (TM) HD 6770M version 4.1.10600 Compatibility Profile Context, ATI Technologies Inc.
java.lang.NullPointerException
at ModLoaderMp.HandleGUI(ModLoaderMp.java:145)
at wt.a(NetClientHandler.java:722)
at ey.a(SourceFile:27)
at iq.b(SourceFile:272)
at wt.b(NetClientHandler.java:64)
at gx.c(SourceFile:57)
at net.minecraft.client.Minecraft.k(SourceFile:1388 ) <-- space added to prevent smiley
at net.minecraft.client.Minecraft.run(SourceFile:666)
at java.lang.Thread.run(Unknown Source)
--- END ERROR REPORT 2b57cc91 ----------