Re: Questions on Bak Sil Lum
It’s been awhile since I’ve posted here, but here’s my shot. I’m a student of Wing Lam, so things might be a bit different from what Lai Hung may teach.
1. How is the systematic training-process in Bak Sil Lum to translate the forms in effective fighting technics for real dangerous situations.
That’s a tough question. Bak Sil Lum is a very deep style. Within the style are only really a few different techniques (some stances, some strikes, some steps, etc.). I tend to think of the forms as an in-depth study of how these smaller elements interact to create effective body movements and patterns. Although in the beginning one might take a few techniques from a form and practice them for fighting, the higher level is understanding the smaller pieces and being able to spontaneously react with them to any situation. Unfortunately, it takes years of training to reach that level of physical comprehension. I don’t claim to be there yet, either. 
Anybody will tell you that the quickest way to learn how to fight is to learn a few basic moves and train them hard, then spar with them. That’s not really Bak Sil Lum’s method. Even among kung fu styles, it takes a long time to get somewhere (as a fighter).
2. How is Bak Sil Lum build up? Am I right with my follow acceptance: first basic school, then all ten core-forms (perfect one form then learn the next form without forget the basic school), then the weapon forms? And what’s next?
Although it varies from school to school (no one still retains all the original sets), our school progresses this way: First the student learns the two basic forms. Then, he or she alternates between learning the Ten core hand forms and the weapon sets. Sparring sets are also taught, and Iron Palm and Small Golden Bell Qigong are both part of the curriculum. Wing Lam teaches 2 basic sets, 10 hand sets, 16 weapon sets, 6 sparring sets, Iron Palm, Small Golden Bell, and a few supplementary sets from other systems.
3. Which Internal-Arts / Chi Kung-Arts are in the curriculum of Bak Sil Lum?
The Iron Palm technique of Bak Sil Lum comes directly from Ku Yu Cheung, who was famous for it. It conditions the hand and also trains the open hand strikes to use soft, internal energy rather than tense energy. The Small Golden Bell Qigong is a set of internal exercises that conditions the body to withstand bludgeoning strikes. It is known generically as Iron Body or Iron Shirt.
4. Are there any additional exercices (except the classes which prepare for sparring-competitions) like push-ups, sti-ups, press-ups, jogging, sandbag- or paws-training, or …?
Other than the sets and some partner drills, there are no set calisthenic exercises that a student absolutely must perform, though many martial artists augment their training with push-ups, crunches, hindu squats, jogging, and weight training. Stretching is a good thing to know.
5. Please give me the approximate precentage of each training-element from the whole Training in Bak Sil Lum. (please separate for beginners, advanced an “master level”)
That’s really hard to judge, since it varies between schools and even between classmates. Some people avoid basics training like the plague and only practice what is new and fun. Others practice basic skills such as stance work religiously. I can say that Bak Sil Lum’s training methods are heavily reliant on forms training (see #1).
7. Do Sifu Hung Lai and Sifu Chan Kwok Wai instruct the classes still personally?
I don’t have any personal experience with either of these teachers, so I can’t really say.
I hope there was something in there for you.