Home Recording Help Please!

Objective: I am part of a four piece rock band that wants to record our songs , so we can distribute them over the net. By the way, we don’t have any money to buy new equipment.

Equipment: 600W Powered Mixer, Microphone, Speaker, Powerbook G4 Laptop

[]What are some good programs to record on the Mac?
]Where should we record (i.e. room, backyard…)?
[]What extra equipment do we need (if any) to start recording?
]Do mattresses help reduce noise?
[*]In what order should we record (i.e. guitar, drums, bass & vocals)?
Here’s a link of the mixer:

Any help will be appreciated. Thanks.