hello,
we do not practice this set. all i know is, that Lam Saiwing's student Leung Winghaang has created a set/system call snake, cat and snake (se maau hok kyun). a book on this set was released some time ago, both with photos of Leung Winghaang and the other oversion with drawings. i do not know though if it is the one that you do
all the best