FIFA Soccer 06 Cheats

Win everything in manager mode with any team
Pick a team, then start your career. Save your game. Choose "Next Match", then "Quick Sim". If you win the match, save your progress. If you lose a match, return to the main menu and load your career again. You can have as many chances as you want against a team, as the outcome is random every time. Make sure to save your progress after every win, in case you lose unexpectedly.

Increase profits in manager mode
At the start of your season, do not spend the money you have immediately on staff upgrades and new players. Instead, spend the money you have on renewing player contracts. Wait to get your players morale up first, as they will be more likely to accept a renewal if they are happy at the club. Sometimes you can cut a players salary in half, if not more. Make sure to save the game before renewing contracts so that you can start low, and increase each time if the player refuses the renewal. If a player refuses the renewal at a high price, and they have a high moral, then it may be because they are close to retirement. This can earn you up to 3,000 credits (off your current salary) each match if done well. Alongside a good sponsor, you could be earning 7,000 to 8,000 credits each game when at home.

Full stat team
You can make any team have full stats by editing each players stats and upgrading them to 99. However, be warned; if you start with this team in manager mode, your salary will be high. Make sure to cut their contracts down as soon as possible.