You don't need to rename it, you can do it by right-clicking the mod and select "Copy to esp" option
By the Gods, that was incredibly easy! Thank you! That saved me days and days of work. Now I can merge PE with COM without the compatibility errors or the dependency of COM.esm. And then I can delete all COM references in the game world to avoid duplicates. Thanks, ShinRA88!
And I just played it in game and it works just fine.