Nero DVD copy requires 2 drives

Hi

Why does Nero require 2 drives to copy a DVD?
Surely, since it appears to first compile the DVD files to HD, Nero creators could offer the option to change the disc, in the same way CD copy is done.
I found lack of this feature this really annoying when I tried to copy my first DVD, nobody mentioned I needed to purchase a second player.
I know it is a small thing, just annoying.
Does anybody out there know of a plugin to solve this?

You must be doing something wrong. Are you setting the source and the writer to the same drive? Do you have burn at once unchecked? I just use my external dvd burner all the time and recode tells me to insert a blank dvd-r after it finishes recoding the dvd. So it does not require a second drive