oupsemma wrote:Assuming that being in Belgium you might be speaking French (but of course you could be in the Dutch speaking part!), you might have a look there:
(snipped)
Otherwise, in English: https://help.ubuntu.com/community/WindowsDualBoot
Instead of using Unetbootin, you could use dd in a live session of any other Linux distribution.
As you're having a working Ubuntu Netbook USB stick, boot this stick, download Statler while in the live session, and install Statler on another USB key with dd.
Then you will have an installable Statler media, and following the advice about dual boot, you will be able to install Statler side by side with your Windows 7.
(snipped)
Thanks for your response!
My French is not good enough to understand technical stuff - English is closer as a 2nd language to me.
I started with the part of resizing windows and managed to free 33GB 
The dd-stuff is way over my head, so I simply tried the "old" way again, after the resizing.
There's still recognition of the 160GB and windows OS when the partitioner is on "use entire disk", but as soon as I choose "manual" or "side by side" it jumps back to the size of the 8GB, which is the USB.
I tried accessing the web to get the Statler iso, but Crunchbang (which is live on the usb now) can't access the www. Of course apt-get install for the usb-imagewriter didn't work either.
With a bit of luck I'm getting some hands-on help tomorrow evening.
If not, I'll just do a "use entire disk" install soon, because I don't want to keep windows anyway. It was just for some scanning stuff I needed windows.
I'm still intrigued as to why the partitioning acts so strange.
#!+mocp=music in my ears