I need some help with resolving the Block ID conflicts between Railcraft and Forestry. Ultimately what it boils down to is that I’m not sure what ID to change one of the blocks to. Well any way here’s the crash report.

*** Starting Minecraft ***
Minecraft version: 1.2.5
Minecraft.jar: minecraft.jar
Mods:
ModLoader.zip
minecraftforge-client-3.1.2.90.zip
CodeChickenCore-Client 0.5.2.zip
NotEnoughItems-Client 1.2.1.zip
Treecapitator 1.2.5.e.zip
Floodgate.zip
Inactive external mods:
EE2ModV1.4.4.0.jar
Java path: C:\Program Files\Java\jre7\bin\java
Memory: 1024 MB
LauncherPath: /C:/Users/Administrator/Desktop/MagicLauncher_0.9.7.exe
*** MagicMinecraftLauncher 0.9.7 ***
27 achievements
182 recipes
LWJGL Version: 2.4.2
ModLoader 1.2.5 Initializing…
Register ModLoader mods
Mod Initialized: mod_MinecraftForge 3.1.2.90
Mod Initialized: mod_CodeChickenCore 0.5.2
Mod Initialized: mod_NotEnoughItems 1.2.1
Mod Initialized: mod_treecapitator 1.2.5.e updated by bspkrs
Mod Initialized: mod_Floodgate 1.2.5
Restoring disabled mods
Disabled: EE2ModV1.4.4.0.jar
Mod Initialized: mod_BuildCraftCore 3.1.5
Mod Initialized: mod_BuildCraftBuilders 3.1.5
Mod Initialized: mod_BuildCraftEnergy 3.1.5
Mod Initialized: mod_BuildCraftFactory 3.1.5
Mod Initialized: mod_BuildCraftTransport 3.1.5
Mod Initialized: mod_BuildCraftSilicon 3.1.5
Mod Initialized: mod_BuildCraftZFP (Forestry Package)
Mod Initialized: mod_Forestry 1.4.4.2
Mod Initialized: mod_Railcraft 5.0.3
MinecraftForge v3.1.2.90 Initialized
Apr 22, 2012 6:30:06 PM forge.ForgeHooks
INFO: MinecraftForge v3.1.2.90 Initialized

Mod Initialized: mod_stevescarts 1.2.0
Mod Initialized: mod_ThaumCraft 2.1.1a
Mod Loaded: mod_CodeChickenCore 0.5.2
Mod Loaded: mod_MinecraftForge 3.1.2.90
Mod Loaded: mod_NotEnoughItems 1.2.1
Mod Loaded: mod_treecapitator 1.2.5.e updated by bspkrs
Mod Loaded: mod_Floodgate 1.2.5
Mod Loaded: mod_BuildCraftCore 3.1.5
Mod Loaded: mod_BuildCraftBuilders 3.1.5
Mod Loaded: mod_BuildCraftEnergy 3.1.5
Mod Loaded: mod_BuildCraftFactory 3.1.5
Mod Loaded: mod_BuildCraftTransport 3.1.5
Mod Loaded: mod_BuildCraftSilicon 3.1.5
Forestry: MinecraftForge minor version mismatch, expecting 3.0.x, may lead to unexpected behavior
CONFLICT @ -58
java.io.FileNotFoundException: C:\Users\Administrator\AppData\Roaming\.minecraft\config\forestry\base.conf (The process cannot access the file because it is being used by another process)
at java.io.FileOutputStream.open(Native Method)
at java.io.FileOutputStream.(Unknown Source)
at java.io.FileOutputStream.(Unknown Source)
at forge.Configuration.save(Configuration.java:286)
at forestry.config.Config.load(Config.java:177)
at forestry.ForestryCore.load(ForestryCore.java:84)
at forestry.ForestryClient.load(ForestryClient.java:100)
at mod_Forestry.load(mod_Forestry.java:31)
at ModLoader.init(ModLoader.java:891)
at ModLoader.addAllRenderers(ModLoader.java:189)
at ahu.(ahu.java:77)
at ahu.(ahu.java:8)
at net.minecraft.client.Minecraft.a(Minecraft.java:394)
at net.minecraft.client.Minecraft.run(Minecraft.java:732)
at java.lang.Thread.run(Unknown Source)
Mod Loaded: mod_Forestry 1.4.4.2
Mod Loaded: mod_BuildCraftZFP (Forestry Package)
Exception in thread “Minecraft main thread” java.lang.ExceptionInInitializerError
at net.minecraft.client.Minecraft.a(Minecraft.java:394)
at net.minecraft.client.Minecraft.run(Minecraft.java:732)
at java.lang.Thread.run(Unknown Source)
Caused by: java.lang.RuntimeException: java.lang.IllegalArgumentException: Slot 204 is already occupied by forestry.energy.BlockEngine@547fa706 when adding railcraft.common.utility.BlockUtility@8aea641
at ModLoader.init(ModLoader.java:918)
at ModLoader.addAllRenderers(ModLoader.java:189)
at ahu.(ahu.java:77)
at ahu.(ahu.java:8)
… 3 more
Caused by: java.lang.IllegalArgumentException: Slot 204 is already occupied by forestry.energy.BlockEngine@547fa706 when adding railcraft.common.utility.BlockUtility@8aea641
at pb.(Block.java:249)
at pb.(Block.java:281)
at agy.(BlockContainer.java:13)
at railcraft.common.utility.BlockUtility.(BlockUtility.java:17)
at railcraft.common.RailcraftBlocks.registerBlockUtility(RailcraftBlocks.java:133)
at railcraft.common.modules.ModuleFactory.initializeModule(ModuleFactory.java:34)
at railcraft.common.modules.RailcraftModuleManager.initializeModule(RailcraftModuleManager.java:140)
at railcraft.common.modules.RailcraftModuleManager.loadModules(RailcraftModuleManager.java:71)
at mod_Railcraft.load(mod_Railcraft.java:52)
at ModLoader.init(ModLoader.java:891)
… 6 more