Collectible Card Game Headquarters

ive read and reread the info on the site, but for some reason i cant get the hq card pictures to work. or for that matter the lq ones. ie put them in the right folder but they stilldont show. what am i doing wrong? thank you for your time

put them in the right folder but they stilldont show

Where are you putting them exactly ?

And also, how are the files named?