Open Chankast Cheater. You will typically be greeted with a clean interface. You do not usually need to install it; it’s a standalone program (portable).
For archival and educational purposes, here is the classic workflow used by gamers in 2005: Chankast Cheater
tool and wait for it to identify the "base-address" of the emulator in your system's memory. Select Game & Cheats Open Chankast Cheater