I think I friend of mine has How to Pick Girls Up!, not completely sure though, but if he has it I can check against that and see if Lee Kam-Fan is indeed Lee Ging-Fan.
I checked "How" and did not found Lee Ging-Fan in the movie.
But I think it is strange that a similiar name like Lee Kam-Fan is in the credits of two movies with him in good roles but not his name in the cast ("Haunted" and "Master Cute and Da Fanshu").