batch help: finding a variable location

ok basicly, im trying to set up a batch file so that it installs a new map and associated files into a games install folder. the batch will be set up to seek out the old files and move them up to a new folder, add new files in their place (not all old files may be replaced hence a move and not just a copy), so the difference doesnt exist. upon termination of the game, the batch then restores things to how they were. My question is how do i make a batch file locate the appropriate files. the game is registered as its installed so im sure thats the key to it, but i dont know the code i need to access that and make it all work.

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