1. You don't need both. Either decrypt (unlock) them yourself or just use the already decrypted (unlocked) files you require.
2. "EasternEurope" Cyclops covers only Czech Republic, Poland, Slovakia, Hungary, Romania and Slovenia. If using that file in those countries then yes, remove the sample file first.

I see your post shows your location as Odessa. There is no Cyclops coverage there. Belarus, Ukraine and Moldova are not included in any current Cyclops files.
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