Now for the nitty-gritty stuff. How to install the pack.
Some of you may remember the installer from the 1.2.5 version of the modpack - this is exactly the same, with one difference. You WILL need to modify the startup of the instance to be able to play. This is due to the sheer amount of mods we have in the pack this time.
This is quite easy if you use MultiMC (which I recommend you use).
1) Download and run MultiMC (if you haven't already - from http://forkk.net/MultiMC.html) (Place MultiMC in it's own folder - this will make things easier down the line)
2) Create a new instance in MultiMC - There will be a "Change Version" button -...