naeNae, it has to be installed by an approved company to get the rebate. If you install it yourself no rebate.
After June or July you can ring the peeps in charge and they will send someone to do it. Before then you can arrange it yourself and you will get a refund up to $1600.
Because I'm a super lazy bum I'm waiting until July then ringing them.

It only applies to roof insulation - you have to fork out for the walls yourself.

ETA - http://www.environment.gov.au/energy...ency/faqs.html