simple dvd-9 to dvd-9 with dvd decrypter

After reading over the posts here, I thought I would throw in my two bits here. Here is a simple way to copy a dvd-9 to dvd-9 using dvd decrypter.
1. Rip dvd using iso read.
2. Click iso write. Change burn speed to 2.4, select the mds file, and make sure you set the book type to dvd-rom.
3. click write and wait a little while and then presto, you have a copy of your dvd.

You have to have a double layer burner to do this.