No vstsounds Cubase 6/HALion 4 - macOS Catalina 10.15.7

I have a license for Cubase 6 and HALion 4.
I need HALion 4 installation help for my iMac (macOS Catalina, version 10.15.7)
A PC help center in Denmark managede to change the Cubase program for Catalina so it works (it has cost me 120 EUR so far) , but HALion 4 have 2 disks for installation and I can not open the program files. The program files are HALion 4.mpkg and HALion 4 - content 2.mpkg.
It is not possible for me to install vstsounds?
Any ideas are wellcome for download links and installation of HALion 4 for macOS Catalina, version 10.15.7

I’m not sure what is in those but the installers are here:

VSTsounds ‘may’ be on the Steinberg Download assistant - worth a try

it’s fairly old so I suspect Catalina is going to be problematic

Thank you for your answer,
The HALion 4 downloads files are same but I will try the download assistant.