Again carefully reading your quick response I had to get a different approach in the way I usually think when I start a design project. Normally I make my own index.html file and the others files based on this index.html file included with css and javascript. And then link these files with internal links.
Great
! So nothing has changed. You design your index(.php), but that is where it ends. This one file is the template of all your other files, making adjustments to the template much easier as before (even easier than e.g. Dreamweaver). Not mentioning the clean code it gives.
Now by using your great cms I have to let the cms making the html files based on the index.php incombination with the configuration of the .htaccess file. The confusion was that I missed the fysical html files but instead got a php file in the content directory. But now I begin to understand this method and I got the internal links to work properly. So thanks for your reply. BTW I'm not having the intention to know "the secret of the black Smit" 
This is for Your developers.
Good to read. I'm sure that now that you start to understand it fully, you won't want to use any other solution than a CMS in the future. Hopefully CompactCMS, but you never know.
Now onto your next problem. It sounds to me you might be making this more difficult than it actually should be. You write that with every page different images should show up depending on the page requested am I right? If so you could try to name images after the page name (+ a number) and make it once again dynamic.
Let me show you.
Let's pretend you have three pages. "Waar_zit", "wie_is" and "wie_doet". As you might have seen you can include <? echo $urlpage; ?> to show the current file name in the page (without the extension). So if you create six images and name them waar_zit1.jpg, waar_zit2.jpg, wie_is1.jpg, wie_is2.jpg, etc, you can dynamically insert these images, without changing anything to the default installation.
1) Place the six images in the /images/ directory
2) Put the following in the index.php where you want the images to appear:
<img src="./images/<? echo $urlpage; ?>1.jpg" alt="" />
<img src="./images/<? echo $urlpage; ?>2.jpg" alt="" />
Now when you request mysite.com/waar_zit.html, the first line above will read <img src="./images/waar_zit1.jpg" alt="" />. Which I think is all you're after. Downside: you have to follow a strict naming convention for your images, but it is for sure the easiest way to get this done.
Let me know whether you've got this working & if it is actually what you were after.
Xander.
