To install these, simply use the or ISO Builder included in their respective packs. Point them to your clean melee_ntsc_102.iso , and they spit out a game.iso ready to go.
Get the installer from the official Slippi website . melee iso ntsc 102 install
If you have a 1.00 or 1.01 ISO, you usually "install" 1.02 by patching your existing file. To install these, simply use the or ISO