I bought the Monkey Island Bounty pack last weekend
(The one with monkey 1,2 and 3 on CD in a huge box!)
Monkey 1 and 2 work fine with pocket scumm, with the copy protect on monkey 2 accepting any value.
I havent played them on the PC yet, so I cant tell you what the sound/speach (if any) is like.
I'll give it a go tonight and report back!
I also bought the S&M (oo-err!) and DOTT double pack, but I haven't tried them yet.