I will upload this week all Delphi sourcecode of the Lemmix Clones to here:
http://it.travisbsd.org/lemmings/lemmingswelt/index.php?dir=root
and also to here:
http://home.hccnet.nl/ericenzwaan/lemmix/lemmix.htm
This last address will probably disappear somewhere this year.
I hope I will think about this post, when I have a new location for my homepage.
If you have questions or suggestions, ask them here :)
Edit: the zipfile contains a readme.txt with some general information and short hints about each file.