a search engine called google and 30 seconds would have given you this:
Using DVD Decrypter- PS2 backups:
1. Start DVD Decrypter
2. Select Mode, go down to ISO Read
3. Select your Reader & Destination
4. “Decrypt” the ISO Image to the Hard Drive
5. Wait for the ISO Image to be made
6. Select Mode, go down to ISO Write
7. Select the ISO Image file you made, click “Open”
8. Select your Burner, Write speed & Burn the ISO
Using a search engine is the most basic and simple way to find out anything on the net.
This section of the forum should have a permanent thread or a faq at the top of the posts to address just such issues as this.
Other wise the same basic questions will be asked over and over, and people new to the scene are usually ignored.
good luck.