If they are as generic as stated, then yeah no reason you couldn't do it yourself. - It isn't an easy feat from what I have seen though. - Best thing to do would be email Samsung or a phone shop and ask if the screens are indeed compatible for all models just to be safe.
// LG G3 (D855) // Stock // Stock //
// HTC One (M8) // GPE Stock // Stock GPE//
// Nexus 7 (flo) // Android L // Stock//
S3(White) > M7(Red) > Note 3(Black) > Nexus 5(Black) > M8(Gunmetal)/LG G3 (Titan Grey)