Louis had to remove a number of older walkthroughs from the website in order to make place for newer and also English walkthroughs.
He has made a archive of these walkthroughs, they are all in Dutch, and he has made a zip.file of it.
Go to the homepage of www.pcgameswalkthroughs.nl
, click on walkthrough archive and you will find the list with the removed walkthroughs.
You can download that zip.file, it contains all the walkthroughs of the list.
Download, unzip that file and choose the walkthrough you need. Then unzip that walkthrough.