FileForums - Silent Hunter 3 Mini Image

Well,
first of all: Hi there.

I know I shouldn´t be asking, but anyway, I´m desperate.
One of my principles is never to buy a game before testing it, especially not such that need patches and still have numerous bugs...like SH3.
Therefore I tried to use the mini-image from GCW, but I just can´t find a key (which the program is asking for) no matter how hard I tried to find one.

My question is:
Am I doing sth. wrong? Or do I really need to enter a serial for mini-images and if so, can anyone give a stupid moron like me a little hint where to find them?

Thank you,
Knecker