You're welcome.
Credits is a Video-only field, so that's why I didn't use it. It really should be made available to audio too. So that's why in the amg script I have it mapped by default to a field called "AMG Credits".
Notes is a "Large Value" data type in MC, and I've noticed some troubles trying to populate Large Value fields via MCWS. I'll have to investigate further.
The AMG script supports all sorts of data, but much of that data comes from additional pages for an album. So you'll have to decide which data you want pulled, as these pages are pulled with their corresponding fields are requested (i.e. Lyrics, Related Artists, Awards, etc.).
The Discogs script currently pulls the data I've listed on the forum post. If you're only getting simple info w/no credits, be sure you're using a Release entry (and not the Master entry), and one that has credit info. Examples:
Master entry:
http://www.discogs.com/Pink-Floyd-The-Wall/master/11329 Note the "m" master ID in the upper-right corner, and "master" in URL
Release entry:
http://www.discogs.com/Pink-Floyd-The-Wall/release/1981313 Note the "r" release ID in the upper-right corner, and "release" in URL
And here's a release that has some track credits, where the one above does not:
http://www.discogs.com/Pink-Floyd-The-Wall/release/2515106I'm happy to grab additional data; just let me know what kinds of stuff you're interested in.