I've an Eduquest as well, not sure of the specific type, but it's a 486SX-25 or 33. It came with the caddy CD-ROM, sound, and NIC. The hard drive was also in good shape, and outside of the specific networking information from the school it was located at, hasn't had anything else installed/changed from factory.
It has both SCSI and IDE on-board, which I thought was really cool, and the front audio panel was a nice touch. One of these days, I'll get around to photographing and documenting my systems (this is definitely one that needs documenting, as there is very little out there outside of William's site)
As for how they come apart it's two screws on the back side (not under-side), then the motherboard tray just pulls out. Be careful when pulling this out, however. You'll need to disconnect the audio panel header and the video header in order to pull the tray out all the way.