Thanks for your responses Christep and HK-UMICH, glad you could confirm that what I was attempting was feasable.

I have been to HK many times, and as this is my dad's first time abroad I would love to show him about the place. Sadly we are on a very tight time frame, and hence the only chance would be a four hour stop.

I'll follow your advice and do some more research before committing to either itinerary. Thanks again for your advice.