I really don't understand why there are no guides for this yet. This mission was tough for me to begin with, it's just one part of the mission really that you might struggle on. The rest is a breeze. There are much harder missions on Veteren, believe me.
The tricky section is in the second part of the walkthrough (the second video)
Take note: I always use "NextGenWalkthroughs" and "Roosterteeth" for achievment guides, they have an extremely useful commentary and frequent tips.http://www.youtube.com/user/NextGenWalkthroughshttp://www.youtube.com/user/RoosterTeeth