Protoss: There isn't any easy way without looking it up on the internet?
Don't know. Did you simply try to start one of the holds with any version of DROD? Maybe they are compatible with all of the games and you don't even need the info.
Edit: Ok, I just checked with the Architect's Edition (the only version I had installed on this computer). You can at least not play newer holds with an older version of the game. Game will recognize the file, but not import the rooms. Which means you can try to import the files and will see if it works (not the easiest way either, but a way to check without using the internet).