This program works by finding values in games, then allows you to edit them. You can get more lives, points, ammo, etc... This program is a little old, but one of the fastest I've used. It only works with numerical values, but can still help you a lot if you are stuck in a game. There is no help file, but here are the basic instructions:
1. Run your game, and then run Cheat Finder
2. Select the game from the list, and click on 'Search Value' (It's on the left)
3. Type in your current number of lives, points, or the value of whatever you're going to change and click start
4. Go into the game, and change the number (By losing a life, gaining points, anything to change the number you just searched for)
5. Go back to cheat finder and type in the new value, and click Continue
6. You can repeat steps 4 - 5 until you've narrowed your search down to a couple values
7. Click on one of the addresses (It should look something like '00BD4E12'), and click 'Insert'
8. Type in the name (It can be named anything, like 'LIVES' or 'POINTS'
9. Click on the address you just added, and click 'Change'
10. Type the number you want to set it to, and press OK.