I went ahead and uploaded the contents of the Marimba CDs: Official Marimba Guide to Castanet and Official Marimba Guide to Bongo. They're 16-bit executables, so they won't run on 64-bit Windows, but they will probably run on Wine on 64-bit Linux. (I haven't tested it yet.)
We just got the character visible yesterday. It simply required figuring out how to specify the outfit, gender, and skin color in LoadAvatarByID. We also got chat bubbles working. You can download the packets here: http://niotso.org/files/loadavatarbyid_guy.dat http://niotso.org/files/chatmsgpdu.dat
Thanks, we also mainly post updates on the Discord chat since that's where a lot of people are, but we'll still update here too if the Discord chat isn't available to us.