If you have the broken version, delete that  erf after you unequip the weapons and save to avoid further stat inflation.


Drag and drop the weapons of darksouls.erf into your my documents/bioware/dragon age 2/packages/core/override folder

To add these in the game you will need the dev console enabled, just about any cheatcode website should have instructions on how to enable it.

The console command is runscript darksouls