http://hkmdb.com/db/movies/images.mhtml?id=10539&display_set=eng

1. Ah Gil's little sister - Winnie Chan?

2. Jordan Chan's totty - Tien Pu Jun

3. Elvis Tsui's surly totty - Wai Wah

4. Chapman To and Leung Ka Fai

5. ? and ?


6. Eric Kot's kid - Tommy Yuen Man On

7. Thugs


8. Bitchy girls


9. Tough guy


10. And I thought this was Teresa Mo first, but now I think it's Candy Yu On On...


11. No idea on these... were they even in the film?

1. Winnie Chan (陳穎妮)
2. Tien Pu Jun (田朴君)
3. Wai Wah (衛華)
4. yes
6. Tommy Yuen Man On (阮民安)

Thanks! I've edited the ID'd images out of the post