Moving single app from sd-ext to internal

[12gage]

I know this has been asked before, but when I tried searching it I couldn't really find a clear answer. I'm using Dark Temor's a2sd on MIUI, I would like to move GTA from the sd-ext to the internal memory to see if it will help with speed. Is there a way to do this? Is it as simple as moving the apk from sd-ext/app to data/app with Root Explorer? Sorry for my ignorance, I want to play a less lagging game, but not at the expense of messing my phone up. Thanks in advance.


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