Goto C:/Program Files/Microsoft Games/Microsoft Flight Simulator X/Captain_Sim/navigation folder and locate the files Airports.db and Runways.db. First and formost backup those files somewhere else on your system and follow the steps below.

In Airports.db add the following after line (28;VHHH;22.308919;113.914603):

15;VHHX;22.316959;114.202621
save and close the file.
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Now open Runways.db and add the following two lines at the end of the file:

VHHX;3;111.90;22.326667;3390;114.191667;13;088
VHHX;3;109.90;22.309570;3390;114.209178;31;316

save and close.

Thats it go fly.
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NOTE: this does not includes SID and STAR procedures. I've requested Terry(http://planepath.com/) to help me on that, so i'm waiting for his reply. If He responds i'll be happy to share that with you.

Happy Landings 8-)