Now that I think of it, that might have been what I had.<snip>
Well, to add to the confusion, CD-ROM is one form WinLemm was made available as. I think I might even own such a CD-ROM in a collection I acquire. However, AFAIK the WinLemm CD-ROM is strictly files-only, and contains no CD audio tracks (ie. tracks you can actually play on a CD player outside of a computer), and WinLemm only uses MIDI for its music AFAIK. So it's not the CD version I'm thinking of that CustLemm allegedly came from. [Of course, who knows if they might be another version of WinLemm out there that does do CD audio track music?]
I believe DragonsLover from one of the older Lemmings forums had stated that he has the CD version I'm thinking of, which I think runs on DOS (not Windows) and actually uses the CD's audio tracks for the music. Unfortunately I don't know if there was ever any detailed information posted on that forum on how that version is made available. I imagine it's something along the lines of Covox Lemmings but who knows.
I actually can kinda see Clam's argument about 60->63 possibly been how WinLemm came to have the higher safe-fall distance. Since Windows programming is so different from DOS programming, whoever made WinLemm would pretty much have to rewrite the game logic from scratch [
edit: on second thought, I might have overstated the case; certainly the aspects of the game programming outside of graphics, sound and UI can conceivably be ported directly with little changes, as both DOS and Windows run on the x86 instruction set], similar to how Eric did it for Lemmix with the information I gave him, and it's not hard to imagine some miscommunication happening somewhere that leads to the change in WinLemm. But CustLemm is DOS-based, so there would not have been a need to ever modify the game logic part of the programming.
Unless maybe whoever made CustLemm decided to make it behave more like WinLemm because that's the version he's been used to?
And yet, I think whoever made CustLemm is also the same guy that made LemEdit, and from the rambling "documentation" that came with LemEdit, he seemed pretty proud of LemEdit being able to run on low-end DOS machines, so he didn't really sound like a Windows guy to me at all.