Its quite easy to make a disc image of your ps2 game, but whatever happens youre gonna need to download something...
1. Download DVD Decrypter from This link
2. Install DVD Decrypter.
3. Open DVD Decrypter. Click Mode, and under ISO, click Read.
4. Put your PS2 game (DVD) into your PC's DVD drive.
5. Click File - Decrypt.
There are many programs that decrypt and rip DVD's to an image file.
DVD Decrypter is one that i have found useful.
If you need any other help, or are having problems downloading over you dial-up connection, email me at (firstname.lastname@example.org)