The Amazing Neverending MSX Quiz!

Correct.
Now I think it's fair to say Snout completed the answer.
Even if he didn't explain what Mister Hansen had to do with Excelsis.
(Kai Hansen played on the album of Iron Saviour at the time on which Excelsis performed dragonslayer at the album unification. Excelsis got the deal because they won the competition organized by Rockhard & Iron Saviour (read Piet Sielck/ Kai Hansen) which ran dureing the Atlantis Falling Tour from Iron Saviour.)
But I count the fact that Excelsis was found and the correct mathing song to be good enough. (Didn't think someone could find this one really. Next time will make a easy question. However I thought the Sailor Delight question was at a good level.)
So it's up to Snout.

A guess:

Were they meant for France (or somewhere in Southern Europe), and could you tell because of the AZERTY keyboards?

They were dumped from the British market since there was a pound sign on one of the keys.

BiFi: "in which Konami game..."

Street Snatch, (Konami special),
Mika Slayton Poker, (Konami special),
Metal Gear: The FD files (FD #39),
Junker HQ (Konami special)...

err... that's all I know