Drain the coolant down enough so that it is below the lowest point of the hose to be replaced. This is best done with a cold engine. The most important think to remember is to not overtighten the clamps. Also clean the areas that the hoses slide over. A clean sealing surface seals much better than a dirty one does. Inspect the upper radiator neck for cracks. Yours should have a metal sleve on the inside. If it is cracked replace the radiator. Cheap compared to a new engine.
Good Luck and have fun.