Installing a Firmware File into a Directory

First question - see: Clarification on install on D-Link-885L A2

Downloading a file does that?

Odd...

???

I really donno how you're managing to add instructions from a quite straightforward wiki sentence:

it needs to be installed in /lib/firmware/brcm/

Are you following some other additional instructions?

Perhaps you should reset the OpenWrt and re-try copying the file into /lib/firmware/brcm/ again...without trying to make executable, without executing it, etc.

(It may need the correct permissions, though.)