1. Unable to answer.
Hong Kong Permanent Resident is not a valid status to determine visa policy. The passports you hold is what determines if you need a visa or not.
Unless you are a Hong Kong Permanent Resident holding the following most common passports in Hong Kong, a visa is required to travel to the U.S.:
Australia, Canada, New Zealand, Singapore, United Kingdom (British Citizen only).
2. See here:
http://www.ustraveldocs.com/hk/hk-steps.asp