You Can use this Cheat for all Campaigns and Scenarios.
In the 1st Campaign save the game before doing anything else.
Exit the game completly.
Using a Hex Editor (like Ultra Edit-32) open your saved game
and scroll down to file 00002e70h. It should look like this
beside it : 00 00 00 00 00 00 00 00 0D 00 08 02 DE 00 00 00.
The #'s 08 02 equal 520 prestige points.
Change 08 02 to FA 99 to get 39418 prestige points.
You can change it to more or less prestige points but
I use FA 99 for a start.
Never run units, especially infantry, far ahead of
the main group. The computer player is very skilled
at surrounding and destroying isolated units.
Resist the urge to use the replacement button to
repair units during battles unless you absolutely
have to, as this will reduce valuable experience.
If you can, retreat a badly damaged, high-experience
unit to the rear to wait out the end of the battle.
The Chinese tank destroyer units can be deadly even
to the best Allied armor. Use the stealth tank's
range advantage to pound them from the safety of
three hexes' distance.