Hehe... I did get it to work in the end, yes. I also got the mac version of dosbox and that works pretty well too, if quite slow...
Lemmings 3 is weeird, though.
I've had my fair share of problems with Lemmings 3, too. A0;Fortunately, I have it running now (but only on a 13-year-old machine).
What exactly is your problem with Lemmings 3? A0;If you still have an old machine (Pre-Windows 95), I may be able to help, but I'll need more details explaining what is going wrong. A0;If you're using a newer machine, I'm afraid you might be out of luck. A0;I've never gotten it to work on any computer that runs under Windows 95 or later.
I don't know anything about running the game in DOSBox. A0;My 13-year-old computer has the real DOS, so I have no need for DOSBox.