Hello gredical,
Thank you for your question on installing phpshield. When it comes to whether you can add specific software to your server, it can depend on what plan you are on. This is due to settings that may need to be changed, permissions that may need to be set specifically, etc.
In these cases, we recommend submitting an inquiry to our Live Support team so they can check into the compatibility with the server. If it is compatible, it may also be able to be installed by our team. You can ask that as well. If it can, it may or may not require an installation fee, depending on the software.
Kindest Regards,
Scott M