That's 100% it. I'm almost embarrassed to admit that I have been searching and somehow never found it, even though it's been on Archive.org for three YEARS!
Even recently I tracked down a guy who used to work for Phoenix and remembered it, but had no idea if a copy still existed.
It's interesting how it apparently was customized a bit for Siemens and Micron, as there are subtle graphical differences between the two. Makes total sense give the product, I just had no idea it was used by other manufacturers.
I distinctly remember the Micron version pictured including the bookshelf for launching Day of the Tentacle, Rebel Assault, Encarta 94, etc, and digging through the ini file it looks easy to customize. Though there was a voice that would say something like "Click here to play Day of the Tentacle" when you hovered over the corresponding book.
This is absolutely amazing, I can't wait to dig in. A monumental day! Thank you so much!