You do searches.
0-255 = byte.
0-65,535 = unsigned short.
0-4,294,967,295 = unsigned long.
The first search will find all values matching your criteria.
Then go to the game, change the value, and use a sub search.
So if my HP is 1,025, I search for a short with an exact value of 1,025.
Then I give myself a Potion and do a sub search for values of exact value 1,075.