Thanks a lot to both of you for trying to help me

.
The plugins from this site did not overwrite anything but the export plugins still don't work. Remove white in the same directory strangely does.
I will fiddle some more over the weekend. Perhaps try one more install.
I have written to Corel Help about the error popup. Maybe they know a solution.
Vigilante, the doctor cracks me up everytime I watch the DVD

This movie is Peter Sellers' masterpiece.
EDIT:
I made a new installation, this time on the second drive, making double sure no Antivirus or Firewall was running and gently swiping the CD.
No more registry error, some of those measures or the sum of them worked
Also got the dds plugin AND the associated dlls and that also works now with Wings of Victory files.
Just the nasty bright.8be doesn't work. Maybe PSP needs other dlls for that, maybe it cannot work with PSP8 at all, hmmm I will investigate further as it would be nice to have all the options under one program...