Change their proposed role to and set their wage to £0 .
CM Scout wasn't technically a cheat; it was a revelation . The in-game scouting system was slow and often lied to you (players with 20/20 Judging Ability would still recommend donkeys). CM Scout allowed you to load your save game and see the actual hidden numerical values (1-100 or 1-20) of every attribute.
The best cheat code in CM 03/04 was simply knowing a name. The SI database team accidentally (or intentionally) created a generation of players with CA (Current Ability) and PA (Potential Ability) far beyond their real-world talent. Signing these players was considered a cheat by multiplayer league standards.
While not a cheat, knowing which low-cost players become world-class is the fastest way to win. These players are often "bugged" with high potential.