Gameshark:
1 Buy a Gameshark/other cheat cart
2 Find a big list of codes somewhere and spend a week typing them in.
Port:
1 Buy an Xport/Sharkport.
2 Download mk's GT3gEdit programme (there's a link in Heydu's signature)
3 Read my hybrid-building guide (there's a link in my signature).
If you click on the link in my signature, you'll be whisked to my hybrid-making guide's homepage. All-new on there is a link to download said programme, version 38 (the last version).
