So here's a stab at it. There were a lot of superfluous tags and a missing <body> that I cleaned up. So it's smaller and perhaps easier for you to make changes now:
I don't mind at all, Roger. I was away from my keyboard so these answers came off the top of my head (I believe), but back now with a screen shot and a few more details:
The form’s input tag name should be the same as your KM variable with KM spaces converted to underlines. Radio buttons are no different. But their value is what gets stored with the name. Pop this under your form in the macro and you'll see which radio button was selected:
You don’t tab through radio buttons because you tab through form inputs and radios are just one input. But you can arrow through the radio buttons (start with the Down arrow). And you can set a default too.
Hope that helps. Follow-up questions welcome, of course.