Okay, so I used MVC to downgrade my Minecraft to 1.2.5 to run IC2 v1.95b and Rocket Science v0.89. I installed MC Forge 3.1.2.90 and Modloader. I also tried to install Computercraft 1.41. I got this:
--- BEGIN ERROR REPORT 76bd9724 --------
Generated 1/24/13 7:51 PM
Minecraft: Minecraft 1.2.5
OS: Windows 8 (amd64) version 6.2
Java: 1.7.0_11, Oracle Corporation
VM: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Oracle Corporation
LWJGL: 2.4.2
OpenGL: Intel(R) HD Graphics version 3.1.0 - Build 9.17.10.2828, Intel
java.lang.NoSuchMethodError: ach.setTileEntityRenderer(Ljava/lang/Class;Laar;)V
at dan200.computer.client.ComputerCraftClient.load(ComputerCraftClient.java:35)
at mod_ComputerCraft.load(mod_ComputerCraft.java:80)
at ModLoader.init(ModLoader.java:891)
at ModLoader.addAllRenderers(ModLoader.java:189)
at ahu.<init>(ahu.java:77)
at ahu.<clinit>(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)
--- END ERROR REPORT 34e6d70a ----------
So can anyone tell me any better versions to use or if I'm doing this wrong?