Thanks for these tips, Twerppoet, and all the effort you put into answering my query.
I already had the feeling that it would be difficult to get these shortcuts started directly on the iPad (they do work on an iMac, though). But it would be good if I had a chance to access them directly...
I also have this problem that I can't open Windows internet shortcut files (*.url) in Safari on my ipad. I synchronise them with my PC using PDF Expert. I'm a teacher and use the iPad for all kinds of classroom presentations - and it would be extremely useful if I could also start my internet...