the official features list of MI2SE says: "Character voiceover available in both Special Edition and Classic modes".
so, i have just this one question and i will probably be flamed to hell and back for it:
Couldn't you just play the classic mode with voiceover enabled? So, what is the actual goal of this project when you already got the "talkie" in MI2SE? you'll need to buy MI2SE for this patch anyway, AFAIK.
I'm sorry if i'm totally missing the point of this project. i don't want to offend someone, you guys did a great job on the Ultimate Talkie Edition for MI1.