part 3: according to guidelines, when no change to address and income, no need to provide proof. logically if you have changed address, address proof is certainly required.
part 4: helper better renew her passport first. If helper does not renew passport now, her work visa will be approved for 8 months only upto her passport expiry =Jan 2013. by that time you have to process renew work visa again!!
Immigration tel: 2824 6111, try to call 8:30am, before 9am
email: [email protected]