havent got time to read the whole thread, but i am desperate for a Lemmings 1 level editor, in order to create more 2-player levels!
i hope this project might provide a solution. something that ripped the files, (use the imager slave from the WHDload version? if it uses disk images, then i know the JST install rips files!) then patched appropriately (like lemmings 2 editor) does seem a good solution to the copyright issues.