Argosy Window Replacement

[grey.mama]

I have just a started a complete restoration of a 1973 Argosy 20. We have gutted, removed walls, and insulation. We have a broken street side window but have a replacement.

1. Should we remove all the windows? or just leave them where they are?
2. Can I replace the window that is broken without removing the whole thing? ie. removing the rivets in the outside??

Thanks in advance for any advice. I tried searching but didn't come up with what I was looking for!

[rugjenkins]

A pic would be helpful. If it's a side window they lift out. If it's one of the panoramic windows you need to drill out the rivets around the window to remove.