I managed to install the software on my Vista 64bits system using the downloads and additional workaround mentioned in this forum. The PCGU1000 is working correctly.
A second reason why I had to use the downloads is that the CD-ROM in the package was damaged.
This means I can not use/copy a major part of the contents of the CD
Since there is the line that says: “more details can be found on the CD” and my CD is damaged and won’t allow copying of a large part of the contents, I wonder if a download of the full contents of the CD can be found somewhere.