1. Thank you very much. Thought it might help. Lost some hair too until it worked :D

2. I’ll clarify this in the next version:
-> in Win use ‘Run’ (Windowskey+R) to type ‘\\retropie’
-> go into the ‘roms’ share there and copy all
-> then access your USB drive and paste the structure there
This will make sure you have the right structure for the Pi to recognize

Yes, I just checked -> My bad as I only showed the Pi2 version. You have the 1 I guess, so it would change to:
wget https://github.com/sselph/scraper/releases/download/v0.9.3-beta/scraper_rpi.zip

(Notice the missing ‘2’ at the end)
Nothing changes with the handling.

Let me know if it works or not. I’ll edit the guide as soon as I can.