I have the Cheez Mania edition, I got it from my dad when he used to work at IBM and often fix computers and printers at a Nabisco headquarters in NJ.
From what I recall, the game plays about the same as the standard editions of LEGO Island pre-2000. Yes it includes an interface for Cheez Mania and Lifesavers and other Nabisco products or website. I remember the installer for LEGO Island had Rock Raiders background music and the main cast standing in a row with some tossing hats or doing handstands. I believe some other versions of LEGO Island share that same installer.
If need be I can ready the CD again as best as I can and share anything else found on the disc.
Maniac4Bricks