I recall that, though I never did it. My reasoning is that there really was no reason to cheat in SFC1 unless it was online, and then people when they found out would probably avoid you like the plague (I know I'd avoid a known cheater). Same with SFC2.
So what if you cheat in SP, doesn't really give you anything all that rewarding. It would make the game rather boring I think, as half the game is slowly building up your own forces.