I was wondering if I use the niresh dvd/usb Lion install I dont have to use bootloader ?

also I dont have to worry about bootloader or kexts do I?\


all parts compatible,

z77 ds3h mobo
gtx 650 ti 1gb gddr5
8gb ddr3 corsairvengece lowprofile
i5 3570k 3.4ghz

jus want tomake sure i can use FCP7 smootly as possible,I also have old Lion OSX disc my friend made me that i still have would that work?