Welcome to the site but I'm sorry to say that you've put the wrong foot forward with your first post on a number of levels.
I'm going to presume you're not a troll and because you're from Oz, here's some quick advice.
If you're buying a new PS3, you're only going to be able to play games on original retail discs or ones you've personally downloaded from the PSN.
Reason for that is your machine is going to be on a firmware higher than 3.55 - which is currently the latest firmware with which you can still modify/hack your PS3.
So, first word of advice, if you want to be able to modify/hack your PS3, find a second hand one with firmware on 3.55 or below.
Second word of advice, don't ask how to play downloaded games you don't own. You will get banned.
You can play backed up games (that you own), on a modified/hacked PS3 and there are plenty of tutorials on how to modify/hack and backup on this site. Just use the search function - it's very good.
Third word of advice, don't type in upper case when you type. It's like you're shouting and is considered rude and likely to be ignored - like what was happening until I replied.
Finally, good luck with your endeavours and if you strike a problem or are not sure after you've had a go, by all means post again.
"We all agree your theory is crazy, but is it crazy enough?" - Neils Bohr