i put that stuff to my sd, powered on the wii with sd card in it and it loaded wad manager straight away
cant load anything from my sd menu though, maybe i have to check that for myself.
edit: actually this is where those A,B,C.. things jump in. If you can't load the boot.dol from sd menu you have to download one of those extra packs there. mauifrog is on, he will surely jump in at some point noticing someone needs help here with one of his guides
but try the powering on method.