[Meridian]

The files you're modifying are in the relevant SH4 folder, you don't have to move them anywhere, they are already in place. However, the minitweaker makes a backup of the file you modified and leaves it in the same folder as the modified file. You should always move this backup file out of the main SH4 folder, as it can and often will use the backup for it's values when loading the sim.