For all the people who can't find the link or don't understand how to install it, is here the solution.
I've made for the three saga continues packs (light high dark) a tekkit support. All original from this thread. http://www.mediafire.com/?7diwc6iuaabxj9d
Hey not sure if your the one who created the dokucraft - the saga continues 1.2.5 light extra but just thought i'd tell you that the texture for Infernal Brick is a bit off, seems like someone put some extra spaces in it and you can see through the bricks.
Uninstall all java's and reinstall java 7 64 bits. I had the same problem
You probably have still a 32 bit installation somewhere. If the uninstalling doesnt work delete the java folder in program files and program files (x86), and the reinstall java