Tried to use the modpack you had up for download, and I got a crash. Seems like it has to do with Buildcraft Core.
FINER: THROW
java.lang.NoSuchFieldError: softBlocks
at BuildCraftCore.initialize(BuildCraftCore.java:176)
at mod_BuildCraftCore.initialize(mod_BuildCraftCore.java:73)
at mod_BuildCraftCore.ModsLoaded(mod_BuildCraftCore.java:88)
at ModLoader.init(ModLoader.java:838)
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(Thread.java:680)