=-= Note: Please edit/pm me if I have given a spoiler out or given to much info out =-=
=-= PS: Don't be bums and use a program for this D:< =-=
You're completely spoiler-free, don't worry. Also, welcome to the forums!
As for this mission, acidpunk (among others) had it exactly right. It's not difficult once you know the concept, just time-consuming.