Is there maybe a way to grab the
rendered page from the internet
explorer rendering engine and send it
to a PDF-Printer tool automatically?
This is how ActivePDF works, which is good means that you know what you'll get, and it actually has reasonable styling support.
It is also one of the few packages I found (when looking a few years back) that actually supports the various page-break CSS commands.
Unfortunately, the ActivePDF software is very frustrating - since it has to launch the IE browser in the background for conversions it can be quite slow, and it is not particularly stable either.
There is a new version currently in Beta which is supposed to be much better, but I've not actually had a chance to try it out, so don't know how much of an improvement it is.