Hi Alan,
It has been 2½ year since I wrote the original post.
So, I guess versions of software and drivers has changed a lot since then.

Maybe this post from will help you regarding the wifi driver even though it is also pretty old:

I have not updated my FireCapture installation for a while and everything still works on my Raspberry Pi 4 since i configured it using the steps from the original post.
But I guess that this guide is outdated now, so other people are welcome to make a new post or a reply to this thread with an updated guide.