I did some research a couple months ago when you last mentioned this 'hacking' (cracking is actually the correct term) on the omega forums.

With tools such as GameCheater it is possible to modify values of processes currently running in Windows.

For example, you have a game xxxx which currently holds a score value of 100. After submitting the game process to GameCheater together with the value 100 it will seek all adresses within the process with the value of 100.
After the first test you'll need to continue playing until the score changes, and then rerun the test. GameCheater will then perform the same test but only with the addresses of the previous tests. After a couple tests 1 will come out eventually and you'll be able to modify it.

The whole approach stands on the continued changing of fixed addresses. If you are someone able to change the address that holds your score GameCheater will never be able find it.