tell ya what, get your first classic/lod cd key set, write it down, set it on the left side of your keyboard
get your second set -- make SURE its different from the first set, write down the classic/lod keys and put them on the right side of your keyboard
uninstall diablo 2 completely, reinstall it, use the keys that are on your left, tear up the peice of paper and throw it away, go to step 8 in my guide, follow it like its your first time, use the keys on the right side of your keyboard, make the shortcuts like i said, and on the second add the command -mpq cdkey.mpq
if it still doesnt work then i cant help you. sry lol