Ok, that worked just fine.
I worked out my script so that it is now able to read a ns1 file, and put it into an object for easy access in a php script.
Since I can assume other people would be interested in this, I'll soon make it public so everyone can use it.
There's only one main problem I'm having, and that are the FILETIME fields. Those are 64bit values, and appearantly PHP doesn't quite convert them as well as I would have hoped (lack of 64bit int). If anyone knows a good way to convert such value to a more usable format, do speak up
I currently split it up in 2 uint(32), giving me the low part and high part of the value.
Tom