Unpacking ?

First : Why/other mods, if you're reading this and it's the wrong section then please delete it.

Okay, as some of you who play CA may know, Nexon has started to pack their files again(CSHell.dll ,EHSvc.dll , and Engine.exe). I was looking around google and I couldn't figure out how to unpack it or a good tutorial at least because most of them were stuff to do with unzipping files.

If anybody knows a good tutorial on how to unpack (manually ?) or knows how to unpack, I would be grateful if you could help me out.

Yep, they've got a lot of reversing tutorials, that's what Im reading up on. Also check out this: