I really can't answer a lot of your questions, but I can tell you this. I own the software, and I love it. I have yet to even research using anything near it's full potential, but I only had to load it onto my laptop and was able to enter all of my
US coins and put a grade with them. You can insert your own pictures easy enough to replace the basic generic images that they provide.
I like it. I don't think there is a limit to the number of coins you can enter, and you can certainly enter duplicates if you have them.
Coin manage 2007, which is what I have, includes:
Australia
British West Africa
Canada; New Brunswick, Newfoundland, Nova Scotia, and P.E.I.
Great Britian- goes as far back as 1649, Fifty Shillings, Oliver Cromwell, maybe even further....
US
There are also links by year which seem to include more countries.
2005, all of the above plus:
Jamaica
Mexico
Philiipines
Switzerland
Hope this helps. I do not see reference to Scotland, Wales, and Ireland, but I would guess they may have an add on for more countries.