@Pyjamarama
Sadly the scraper currently does not support Amiga:

An auto-scraper for EmulationStation written in Go using hashes. This currently works with NES, SNES, N64, GB, GBC, GBA, MD, SMS, 32X, GG, PCE, A2600, LNX, MAME/FBA(see below), Dreamcast(bin/gdi), PSX(bin/cue), ScummVM, SegaCD ROMs.

I would love to use it for Amiga games also :(

@BuZz
My sincere apologies about the formatting BuZz. I did read that first and had full intentions of following it, but in my haste to post totally forgot about it. Again, my apologies!

I think you're correct with the date and time thing. I noticed this before and tried to fix it, and with that too now, I am having issues.

I've googled and followed a ton of ways to try and get the time to sync, but no dice.
I suppose that should be a separate thread, and if that is what you want, just let me know. I'm totally at a loss as to whats going on with this Pi. I've just installed the image again and no luck changing the date, OR using the scraper.

For the date/time I've tried:

Setting the timezone in raspi-config (didn't stick after reboot)

Tried these to no avail:

https://www.raspberrypi.org/forums/viewtopic.php?f=53&t=144095

https://victorhurdugaci.com/raspberry-pi-sync-date-and-time

And a few others I don't remember the URL's.

@vbs I'd recommend you to take a look here:
https://forum.recalbox.com/topic/4690/soft-universal-xml-scraper-v2

If your gamelist.xml is being over written you can check to see if you have "save meta data on exit" enabled (press your start button and go to 'settings' If I recall coreectly). If you do not disable it, emulationstation will overwrite your manual XML entries. Turn it off before you jump to prompt or ssh in to edit your game list.xml. You will also need to restart in order for your manual entriesnto appear as well.

@sselph
I used it for the task I explained here:
https://retropie.org.uk/forum/topic/3353/take-and-scrape-your-own-screenshots/47
And it's working fine.

It's a scheme to let the user take screenshots of a game and set the most recent screenshot as the emulationstation image for this game.

Here is the complete code:
https://github.com/meleu/src/blob/master/screep.sh

OBS.: It's intended to be the runcommand-onend.sh script.

Cheers!

Thank you for writing back @meleu I think my "method" is somewhere inbetween. The fact is my non-merged full 0.37b5 romset (2241 roms) matches perfectly the 0.37b5 snaps (2241 snaps, a lot of work saved!) so what I do basically is:
1.- add
screenshot_directory = "/home/pi/RetroPie/roms/mame-mame4all/images/"
to
/opt/retropie/configs/mame-mame4all/retroarch.cfg
2.- move roms to Retropie/roms/mame-mame4all
2.- move snaps to Retropie/roms/mame-mame4all/images
3.- run
/opt/retropie/supplementary/scraper/scraper -add_not_found=true -append=true -download_images=false -image_dir="images" -image_path="images" -image_suffix="" -img_format="png" -img_workers=0 -no_thumb=true -thumb_only=false -thumb_suffix="" -use_ss=true -use_gdb=true -use_ovgdb=true -workers=4

Then gameslist.xml is created. I think those steps might be useful to users who already have a preference for snapshot packages.

However, I wonder what would be the best approach in the following scenario where there it no a rom <--> snap match:

1.- add
screenshot_directory = "/home/pi/RetroPie/roms/snes/images/"
to
/opt/retropie/configs/snes/retroarch.cfg
Move all 3438 No Intro SNES roms (Nintendo - Super Nintendo Entertainment System (20161130-222348_CM).dat) to
Retropie/roms/snes
Move all 3352 .png snapshots (No-Intro 20061119 Super Nintendo Entertainment System Screenshots.7z) to
Retropie/roms/snes/images

One more problem, snapshots name do not match rom names but it is relatively easy to sort it out.
Eg. Actraiser (U).png versus ActRaiser (USA).zip
So I have run a number or find and replace to swap U for USA, J for Japan and so on. Once .png files match their counterparts in the roms folder, the same scraper command is run to generate gamelist.xml
In any case, it is clear that there are less snapshots than rom files so there will be roms without snap. Any ideas on how to find out (list) what are those roms?

PS. I am going to have a good look at that link. Thank you for it.