How do I do this?

Hey everyone,
how do I achieve something like this, http://imageshack.us/f/84/aufzeichnenvm.jpg/
it should look like the letters are stamped in,
I would really love to get some tips here :)

Have a look at this link... there are a ton of really professional looking typography tutorials in there, there might be something you can adapt: Typography tutorials

thank you very much!