I don't know about anyone else, but the new levelpack by geoo89 is probably the hardest I have come across yet. I was only able to solve level 9, which was a simple case of making him a floater right before he lands beside the exit. I expect now that the pack was designed for the fall limit of the original Lemmings.exe, not the original Custlemm.exe, thereby forcing the use of the floater earlier.
So put simply, I'm annoyed! I solved 80% in level 1, but it asks for 92%. So only 2 can die. The simplest route I can think of is to climb and bomb to the right, send another climber to the top, build to reach up to the exit and turn back, and dig through the five platforms, then bomb through to the rest. I now have 4 more levels to build up, and three corners to climb and bomb (providing I have dug at exactly the right place on at least one corner). In short, each step requires either a builder or a bomber, and there are nine steps and only five builders. That means four bombers, plus one to let the climber through at first. And I can only use two.
See why I'm frustrated???!!
Anyway, that's just the first level. They are brilliantly designed and all, I just can't seem to pass any of them! Except level 9, which I'm sure is a backroute/bug.