Cfm21

Then you need to go to java.com, update your Java to a X64

Well, open the Technic Launcher, open Tekkit, and create a brand new world and see if you can do it on there

Depends. How large is the region and how many other structures are there

Change your combustion engines to steam engines and power it with coal

Title: Freezes on Splash Screen Version: 3.0.3/3.0.4 OS: Windows 7 Home Premium Java Version: 7u5 Description of Problem: Just like title Error Messages: Error Log: