Seeing how it's kind of confusing to use the terms Kingside or Queenside when refering to which side one castles toward, I've been trying to think of some better names. It is true enough that we can use the regular Chess names and keep in mind what really happens, but seeing how the long castle is on the regular Chess Kingside in Embassy Chess it seems to me a different set of names would work better.
With the royalty on the one half of the board and the military and ecclesiastic leaders on the other it should be easy enough to just name them in that manner. A royalside castle would be moving the King to the "B" file and a courtside castle would be moving the King to the "H" file.
Yeah?

Fencer reversed 0-0-0 and 0-0 in relation to regular Chess notation, but they do match as to which side is the long side. Courtside gets the three 0's. There shouldn't be any confusion unless you are able to castle on either side that move. You can always write the square you move the King to to avoid ambiguity.

Now about them C's and A's! Fencer said a few months ago he was aware of the problem when he was talking about Grand Chess. Same piece names as in Embassy Chess. When Embassy Chess was added I asked about it and he said he was aware of it, but it had a low priority. Apparently it's an artifact of the Gothic Chess HTML notation used on this site. Ed Trice had a quip about the icons used for the Marshalls and Cardinals in both games too. Janus Chess has its "J" for Janus and the strange puppy icon. Maybe all it requires is every C and A changed in the HTML code to M and C respectively. If so, send the code over Fencer and I'll take it up and send it back. It's got to be less than a couple hundred edits, right? A rather tedious job, but I'll do it. If it requires something that requires programming knowledge, then no, I won't be able to help.