Import Tray Settings

Okay, so I downloaded MCCC to my game. I want to import sims that I downloaded from gallery. I am not very good at this though, I've watched couple of tutorials and I see people mentioning the adding of the #mccc_include hashtag. I can't seem to do that, since I can't edit the description of the family, because I haven't created it myself. Is there any other way for me to be sure that I've successfully imported those sims that I downloaded into my game? Thank you so much.