atkins & hoyle Ports

My Cal 35 has two atkins & hoyle opening port lights in the main salon that I want to remove. I am in the process of replacing the vinyl on the cabin sides and I want a neat finish around the ports. Has anyone attempted to remove the inner frames? Any tips? The 4 screws in the corners of the ports appear to be cap screws that go through to the outer frame does anyone know if they are? I emailed atkins & hoyle and they were not much help. I will probably try calling latter this week but I am wondering is anyone here has messed with these. Thanks for any insights you can provide David Lyons 1984 Cal 35 - Windsong Need Mail bonding? Go to the Yahoo! Mail Q&A for great tips from Yahoo! Answers users. http://answers.yahoo.com/dir/?link=list&sid=396546091