So here's the deal:
I bought the Gobliiins Pack, and installed all three games in both versions, but I'm experiencing issues with Goblins 3.
CD Version: I can't get the in-game music to play, despite intro music working.
Floppy version: I can't get past the copy protection screen. (am I just not paying attention?)
I'm running Windows XP Home SP 3 on a brand spanking new PC.
Hope someone can be of help. :)

I don't have this game, but try looking in the game start menu folder for a reference card or text document with the codes you need. Or look in the extras available for download with this game (on your 'my account' page) for the reference card with the codes.

Because your on XP you could try messing with sound hardware acceleration from the dxdiag.