Bearing in mind that there is currently no way of doing with PS2 DVDs what we do with PS2 CDs, you have to rip from DVD to disk. Go to the following sites to embark upon this complex and time consuming adventure:

http://www.epsg.homestead.com/ps2page1.html for all the software required
http://www.megagames.com/ps2/ps2_guides_files.shtml for an additional tutorial

Good luck