Creating and Securing the Welcome Page?

I will be deploying the notes client version 6.0.1 with R 5 servers. The servers are running R 5.0.8 and are 2000 and NT machines. It will be awhile before the servers are converted to version 6.0.1. I would like to create a corporate welcome page. Is this possible in this mixed environment and if so can I secure it so the users can’t be changing it? We are deploying the client first based on a discussion with IBM.

Thank You in advance for any help with this subject.