For support letter, just write something like :
(actually some rubbish which is already stated in DH contract, but usually the Consulate and Imm Dept somehow likes to have a copy of such a letter)
The Consulate General of The Philippines
6/F., United Centre,
95 Queensway,
Hong Kong.
Dear Sir,
Re : Ms. xxxxxx
Subject : Application for Entry Visa
The above-named person is being employed by me, the undersigned, in the capacity of domestic helper.
Her contract shall be for a period of 2 years starting on 5 May, 2004, or the date on which she arrives in Hong Kong, whichever is earlier. During her term of contract, I shall be responsible for her food and lodgings and all benefits as stipulated in the D.H. Contract, and also her return journey to The Philippines.
I would be grateful for your assistance towards Ms. xxx's application for an entry visa, and wish to thank you in advance for your co-operation.