What paperwork to sponsor someone for a visitors' visa?

[OL7MAX]

I don't often come into the Australian section of these boards, sorry, but would appreciate if anyone can point me to where I could get info on how someone in Australia can sponsor someone in India to visit them for a few months. What paperwork is required etc.

Question 2: One of the party of two in India did once overstay a visitor visa in Australia. It was only by about 24 hours and was many years ago. Would that pose a problem? The reason for overstay was some issue with the airline company (if that is relevant).

Thanks in advance.

[OL7MAX]

Anyone?