Unpacking Programs and tutorials

Most people know about packed .dll and .exe files. I thought we should make a thread about it. This would make it much easier to make hacks if people know how to get to the source code. I'll add any information I find.

check the Programming - Tutorials section.. i believe its already made.. if not a few.

its in the main forum section list of MPGH.. with VB and C/C++

Is unpacking sorta wrong if its not your own dll or exe or what ever?