For the first drive, you need a bootable cd to remove the first partition and resize the second (system one).
You won't be able to do it with Easeus, I suppose, as you need to do it at boot time and you're resizing the system partition.
Maybe you need a live Linux CD with gparted. I'll try to find you link to it.
For the second drive, you can delete all partitions and use all the empty space to made a new one.