To have full speed on N64 Games. Get the Europe Roms not US or Japan. To Have Hi-Resulation Texture. Go this website (http://textures.emulation64.com/index.php?id=downloads) and download the Hi-res texture for your game. For example Super Mario 64 should be like this:
com.provenance.n64/hires_texture/SUPER MARIO 64
when you download Hi-res texture, unzip it or them (most of them multiple zipped files) then name the folder to:
Mario Kart 64-------------------------------------------------MARIOKART64
Super Smash Bros-----------------------------------------SMASH BROTHERS
Legend of Zelda, The - Ocarina of Time--------THE LEGEND OF ZELDA
Legend of Zelda, Majoraâs Mask--------------------ZELDA MAJORAâS MASK