Christin at first you burn the PW iso that greg supplied in a blank CD. Then boot from it.
When asked, chose 1 as resolution. Then delete F and G partitions. And then convert the disk to basic.
Now, from the basic disks, you can make more than four partitions (tht is already there), if those are formatted as logical. Make logical partitions, as you require.
For backing up the data of F and G, you may use an external drive, that is the best way.
If you want to know anything more, ask us.