SPC is a connector that adds space in the part of the message were it connects. Other connectors are @, which connects it with no space or anything, and NL, which connects it and adds a new line at the spot were it connects.
Just for reference (I don't know if you were just simplifying it for him) but the term is 'concatenate'
Also, do you have to package every serverCMD like I did, or could you have it all in one package?