I have that Hole in the Head thing that was posted a while back, but I can't get sound during playback becuase I don't have the ADPCM codec installed.

I've Googled for it but had no luck. Anyone know where to get this?

Not sure if these links are any good, but from mule search:
ed2k: ADPCM.Codec.zip  [24.6 Kb] [Stats]
ed2k: Sound.Fix.for.ADPCM.problems.-.Wormlord1442.zip  [17.9 Kb] [Stats]
ed2k: ADPCM.Codec.for.Hentai.Games.zip  [17.0 Kb] [Stats]

[ Add all 3 links to your ed2k client ]

I've downloaded the first and last of what you posted Icono, and both pretty much have the same contents.

The readme says to find the imaadp32.acm file in windows, and it seems I have 8 of them in different locations. So I find the one in windows/lastgood/system32 and replace it with the one in the Zip that is meant for XP, but still no sound!