its a "compressed" file so thats why you cant move it to another "compressed" file, to do something like that you need to unzip the file then make the changes you want then recompress the file. this requires you have editing control of the zip program so the free versions of winzip and winrar dont offer this.
this is why most modders use 7zip since its a full access zip program and its completely free. 7zip lets you make your own zip files so you can create your own compressed files or edit compressed files the way you are asking about.
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