Yes, of course you can use it on your A1200, we use it on real Amigas. You won't even need the boot disk or disabling the caches; it's plug and play now.
Saving goals won't be a problem either, but they will only work on the competition version, not the old ones.
The WHDLoad version was an early, incomplete release I'm afraid.
I'm not an expert on Norwegian geography, but I think you're closer to the tournaments that are held in Sweden.