Could someone please extract/convert the maps present in all of the worms 2 demo's, or at least the single level/scheme Pirate demo that lacks a frontend?

You mean the deathmatch maps with the funny monsters for example?
Because the demo I played has only one ice level and nothing more.

There's like 6 demo's, some with a front end, some without, most with different levels from each other, some demo's even included limited online multiplayer though the demo server no longer works iirc (There are hacks to make it connect to the full versions server but you will crash if any non-demo features are used in a game).

Ok, I only got a very old demo which was found on the W2 full version CD itself (nice job publisher).