As a Hong Kong local, I try to help as much as I can...
Just find this place on this page http://www.pbasehk.com/Macy/Macy2232/DSC00505
, note that the phone number matches! This restaurant is at 120 ,NGA TSIN WAI ROAD, Kowloon City, you can find the exact location from http://www.ypmap.com/en/viewer.asp?mapService=LocationMap
I know this is just some random photo, but since this place is also near Kai Tak where Neobie suggests for the location of the car thing, it is highly possible that the place of that task is at Kai Tak.
haha, I also find this place from here http://hk.yp.yahoo.com/cobrand/listing.html?c=714&b=540&r=0&d=0
, the name of that shop is #543, and it is at the same street as that restaurant, in fact just next to it: 122 Nga Tsin Wai Rd, Kowloon City!
I can't believe I can beat Neobie to get this information first!