HeLp!!!!

sorry my fault, I didn't explain good enough.

When you are at the top you will see a cave walk in to it and you will come to the screen were Cloud slides down in the begining. to the left of the cave on the screen were cloud slides down you can klimb up. (I promise, i
I have done it many times.

And for the magic pot it is inside the Northern Cavern. From the part were you split up your team. You must go left. Then you will have to choos a path a second time upper right. There will be two ereas with the grasy things. (Were you find the Shield Materia)

You will encounter Magic pots in there and some other enemys.
Pluss you will have to give them elxir.

Okay...Let's us see, Did you EVER try the area just before the cave where you snowboard down? Beacuse you look around untill you find a hot spring and then hurry back to the cave where that ice lady is bitching on about being cold and if your hand is still warm she'll fight you can you'll get Alexander, Quite simple really.

When you land with your Snowboard, travel RIGHT FROM THE LONE TREE in the CENTRE of the area. This should eventually lead to a THREE PRONGED FORK IN THE ROAD, at which point you should travel UP to the HOT SPRINGS. Use the activation button (O) and use the HOT SPRINGS. Go LEFT into the GLACIER until you reach the CAVE. Now, with the CAVE ENTRANCE FACING THE FRONT OF THE SCREEN go RIGHT. When you arrive in the rocky area, there is a HOLE in the RIGHT HAND SIDE of the screen enter that and talk to Snow, whom you beat and obtain the ALEXANDER Materia.

This is, at least, how I remember the exact location of Snow herself.