Tbow
you have to click on resize, in partition magic, on the drive you wish to resize, if its to make it bigger, you have to chose a drive in which to take the extra from, this will then make that drive a bit smaller, to make smaller, you resize it as before, but in smaller size, and chose the drive you wish the extra drive space to goto, it sounds complicated, but quite straight forward, when you have set it up to your spefications, click on the apply changes button, your pc will restart, and apply all the changes, when its finished, it will restart again, but you have to restart it again after that, for the whole lot to take effect.
happy hunting bud.
sounds daunting, but not as hard as it sounds