It seems as though there is something wrong with your installation process then.
You must install the game under its default directory first, after that, you must launch the mod and point it at said original folder first, after that, point it where you want to install the game in. You seem to be trying to install them in the same folder.
EDIT: Wait, did you unpack your ISO?
No, you must maunt it on an ISO reader and then autorun it.
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PSA: If you have been having stutter/FPS lag on Disco where it does not run as smoothly as other games, please look at the fix here: https://discoverygc.com/forums/showthrea...pid2306502
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