Simple way to edit custom ROM

I wanna ask a simple question.... I want to edit a deodexed custom rom. If I open a custom rom zip installable file with winrar and lets say I will remove mobileprint.apk from system/app and i will extract (add) aweasome beats mod zip into the Rom that i modify... will this new modified zip rom file works for my phone ? do not send me rom guides etc pls... I just wanna know editing the rom file with winrar, is workable on the phone? Or there is more complex process to make it workable on the phone?

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