[Heiko]

You dont need to take it out, just start and let it idle then start disconnecting one pack at a time (if you unplug one and notice it changes the way the car idles, plug it back in and move on to the next one) You dont have to pull the coil packs themselves out to see if they are working... Just unplug the connector that feeds the coil thats it, you can do that without any tools; If you unplug one and there is no noticable effect at all, chances are either plug/coil is bad.
Just because the plugs are new doesnt mean they are good... I've seen brand new plugs come out of a package that are bad.