It appears quite rare indeed; fortunately, someone uploaded the ISO to the Internet Archive. The suggestions I brought up in your other thread probably still apply, but, man, you are looking at what is probably one of the worst-programmed, hackish ports of video games in history. Even on WinME (which should not need dgVoodoo at all), I could not get them to work properly. Lion King plays no music; Aladdin does, but terribly quiet (there may be something wrong with my MIDI output, though); Jungle Book complains about missing Wing32.dll (so there is a chance it would work fine once I got that, but I didn't bother).

I suspect that the file open error may be related to file system issues (like cannot work with NTFS or cannot work with partitions over certain size, etc).

The last time I successfully played those games I'm pretty certain my harddrives were running fat32 instead of NTFS, so that might be a clue.

I was kind of bummed when the newly released Disney Classic games seems to use the Genesis Aladdin soundtrack, without enhancing the music instrument quality (I would love to have a combination of the Genesis versions smooth gameplay combined with the MS-DOS version good-sounding music quality.

Are you sure these games have any value in running at all?

IIRC I tried Lion King and I think it was just a poorly emulated SNES version?

The Snes has a cropped aspect ratio of 8:7 (was usually stretched to fit the old 4:3 TVs when connected to actual hardware), making say the Lion King a more "narrow" experience in terms of field of view (the Genesis version suffered a bit in terms of graphics and audio compared to the Snes version, more comparisons of the differences on the retro-sanctuary web site), and Aladdin for the Genesis had this underwhelming sound-quality in its in-game music compared to let's say the ms-dos version. With Aladdin in its Windows 9x version on this compilation disk, I think it was possible to manipulate the actual in-game music to sound even richer by changing the settings for midi-output in Windows itself, making it possible to make it sound just as good as the ms-dos version.

I have the MIDI music working in Aladdin somehow. I don't know how....
I have no clue on how to fix the graphics, I even tried using dgVoodoo2.
I also ran the game on Windows 98 SE and it worked flawlessly (despite color limitations and resolution issues).

Make sure that the default/preferred MIDI device is set correctly in Windows, or else the music won't play (otherwise it might select a different audio device).

Graphics will only show up in fullscreen mode.

I managed to get the game to run in a window with graphics and all (even the music too!). Is the music working for anyone else? It has never not worked for me so far.
Using Direct3D 11 MS WARP (software) as the output API in dgVoodoo allows the game to be run in windowed mode.
The trick to making windowed mode work is to press Alt + Enter when the window turns pink (this is at the East Point logo).
The window will be a tall column still, but if you expand the window it will be the max resolution of your monitor, but windowed. You may have to lose window focus by going to another window or by interacting with the Desktop for the window to be expandable.
The game runs quite well, finally being able to see the graphics, except at a much higher resolution and detail. From what I have tested, only dgVoodoo's software mode can make the game go windowed properly.