I noticed though that the approach lights on runway 13 are ALSF-1 but they should be more like Calvert I style. In real life it was probably not exactly Calvert I but in my opinion that would be the closest that is available in the sim.
The approach lighting for the IGS 13 runway are neither a ALSF-1 or ALSF-2 but a combination of both controlled by the Tower under certain conditions.
The lighting had to be designed specially for Kai Tak because of the lead in strobes. Zoom in, those are real pictures.
http://www.cad.gov.hk/english/60th_images/airport16.jpg
ALSF-1 and 2 are weather visibility sensing approach lighting as per FAA and FS9/FSX models those as per real world. At Kai Tak the curved lead in strobes flash regardless of night visibility. However the combination of the ALSF-1 and 2 center line DO NOT strobe if visiblity is greater then 3 miles.
FS9 and FSX modeled the ALSF-1 and 2 so the strobes are not active unless the visiblity falls below 3 miles. This is the same way Kai Tak works.
Run the following video. What you will see is a night visual landing at Kai Tak. You will hear the Controller clear the Pilot for the night visual landing. Do not confuse a visual landing with what we call a visual approach, they are different.
During several frames of the video you will see the curved lead in strobes are on. When the video gets close to 6 minutes duration pay attention to the runway approach lights. They are closely related to a ALSF-1 but the center strobes are not on. Only if the visibility falls below 3 miles and the landing is non-visual (MAP waypoint) then the tower turns on the approach runway stobes which are also sequenced with the lead in strobes. The Tower also has other options for lighting both on field and off field.
http://www.youtube.com/watch?v=6X6HNOKSQUs
In Martin's picture you see red center and red lights going all the way across the displaced theshold of the runway. Some are even elevated on poles along the front road. These lights were also controlled by the Tower for on /off purposes and have strobes when applicable for visibility issues. Notice the elevated red lights on the poles. There is a light under each red light. These are the stobes that sequence from left to right along the frontal Terminal Road that Tower can activate (see end of video).
Which ever way Martin models the lights will be correct because in the end FS does not have a switch to turn on or off certain approach lights like a Tower has based on visibility. The only thing the weather engine in FS controls is the runway approach strobes on/off and that is for only certain type approach lights (ALSF-1, 2).
But then who knows, Martin may have some tricks up his sleeve working in conjunction with the weather engine of FS.