Albertz,
Yep, for me, the Cockpitweb software worked a treat. Especially the Radar screen practice.
I know it’s easy to say, but when you go into the interview room, try and relax and be yourself. Don't try and second guess the questions that you are being asked. Be concise with your answers. Try and structure all your examples. I suppose like telling a story, it will have a start, middle and an end. Remember the "STAR" acronym. Situation / Task / Action / Results. If you structure your answers with this in mind, you will find you will be less likley to waffle and forget your point !
Prepare well, get a good night's sleep the night before, try to relax when you are there, enjoy the day and have a nice cold beer afterwards !
Best of luck.