flash mi5

Hey guys, I know this is noob s*** blablah... But I once tried to flash a custom rom on a LG and I got a bricked phone, so all I want to know is... How can I do a proper flash of this amazing (I suppose) rom eu_multi_gemini_V7_3_4_0_MAACNDD_v7-6_0 I already unlocked the bootloader (ask xiaomi...