No worries at all Mobius, it's a right hard game and some of the levels are done quite well. There is a tiny chance I might have a save file located somewhere on the computer, I will have a look. Be careful if you are playing lemmings revolution, make a copy of the save file which is located in your lemmings revolution folder just in case you lose your save.
All it takes is one or two clicks and you can lose all your saves so make a copy each time you complete some of the levels.