1. i mean it depends on developer.. they could subtract the value, or add to it..
2. some games have static values, such as older xbla games, some CoD games, ect. but a lot of games also have dynamic addresses, that change with every boot of the game lol..
edit: for example: the value comes up in 0xC1234567.. next time it can come up 0xC213890 and so forth..