Ok,I now understand that they are samples,and that it needs a player to play them back. I use a laptop PC (I don't have a Soundblaster soundcard) and I would like to use the 250 mb soundfont GM set (sounds really good).
What is the most efficient soundfont player I can get? I take that there are even free ones like SFZ... is it any good / stable? Sorry about the dumb questions