how do firmware extensions work without startup script?

[Rich]

Hi GNUser

I wanted to get back to you sooner, but sometimes real life interferes with my linux addiction ...

No worries, there was no rush. Besides, patience is one of my specialties.
Thanks for confirming it worked as expected.

... At this point I can't think of any way of making this script better. ...

But if you do, let me know.