If your having trouble getting the Alexander summon material here's the way how to get him. After the snowboard sequence in disc 2 go to the hot springs and click the option "touch it". After a while you'll faint and be in a shack leave the shack and head down the hill. At this point you'll have to leave markers by pressing the circle button. Head north and leave the markers in a straight line because the wind will blow and you could get confused on where your heading. There will be a small cave ahead, inside there’s a pot with an "All" materia inside. Leave the cave and keep heading north until cloud just pauses and you will reach an area with a small cave ahead. Go inside and talk to person that's there after she will fight you, she only uses cold breath and ice2.Be sure to have a good amount of potions, or hi-potions. After the battle she will disappear and Alexander summon material will fall out of the sky. {you can also obtain Alexander summon material in disc 3}