Underground hack. (Invis Hack)
Unknown Value search from range 02000000 - 03000000.
Run up hill, search for increased value, run down search for decreased value. Usually gets to about 40 or so addresses so might have to try some out. there is a faster way but I dont like giving away things. By doing your own scans you will learn how to hack on other games too.
After finding the value all you need to do is subtract 200 from the address that you have while standing there. That way your underground and no one can see you but you can still attack.
Actually there is a much easier way to find them.