I did it in August 09 - it meant going through the International Transit which is essentially just one bored looking guy with a basic scanner at the bottom of a flight of stairs up to the departure level. We were in the lounge within 15 minutes of getting off the plane and it's a fairly small terminal; mrs christep had time for a (paid) massage at the lounge before the return. We were (if I recall correctly) given the return boarding passes in HKG (either that or we had printed ones from online check-in).

However, you do need to enlist the assistance of a CX representative when you get off the plane, and they will take the money off you for the departure tax (~US$11 I think) which you can't avoid. They will take your boarding passes and passports and pay the tax and return them with the tax stamp on the BPs (again if I recall correctly they in fact cam back with fresh locally-printed BPs).

All 74A, 77A, 34B, 33B have long haul business. 777, 773, 330 have regional business.