The BILLANDTED skip code only works on the 1991 version of the original Lemmings. There is a later version of the original Lemmings dated 1995 where BILLANDTED does not work. The skip code for that 1995 version is unknown.

Thanks. There is another file posted by DragonsLover called LemmingsCorrected.zip I had a question about but his email is not working. Not sure if he still posts here.

Many files here don't say what they're for...the two LRB files are a total mystery to me ("oopsplumbing.lrb" AND "Works on so many levels....lrb") as to how they're used.

https://www.camanis.net/lemmings/lemmingswelt/

Steve

I switched to this version and verified it also works:
https://www.camanis.net/lemmings/files/games/lemmings/lemmings_dos.zip
I did notice in the ZIP file above that when LEMMINGS.EXE is run the graphics in the game seem a tiny bit different than VGALEMMI.EXE (not speaking of the color issue fixed by vgaonly as the Machine...this is very minor).
I can't really say one looks better but I assume the later version fixed some issues.
The 1993-dated file LEMMINGS.EXE for some reason shows copyright 1995 in the game but VGALEMMI.EXE shows 1991. Not sure why...obviously altered.
Steve

This is done using DOSBox v0.74-3 along with DOSBox Game Launcher v0.96 and the settings are all done in DBGL not DOSBox itself.
I ran into an issue setting this up and wanted to share with you because the graphics will start out in a larger window and then will shift to a smaller window once the actual game starts.
These settings work great and result in a large window for the entire game experience with no video or audio issues.

Output: opengl (nothing else I tried forced the actual game window to be as large as the opening screen)
Frameskip: 0 (default)
Scaler: normal2x (default)
Forced: checked
FS Resolution: 1280 x 960 (exact doubling of 640 x 480)
Window Resolution: 1280 x 960 (exact doubling of 640 x 480)
Fullscreen: unchecked (default)
Double Buffering: unchecked (default)
Aspect Correction: unchecked (default)

I did use LemmingsCorrected.zip from here:  https://www.camanis.net/lemmings/lemmingswelt/
I don't think using that was necessary and the settings above should work with the original un-corrected version.
Steve