Not particularly difficult for cd and single layer dvd ps2 games but you must have a functioning mod-chip or other boot method.
If it’s a cd you must have a reading/writing combination that is fully dao96 capable. Then just read and write with alcohol using Playstation 2 datatype settings.
If it’s a single layer dvd, use ImgBurn to read in iso read mode and then burn with ImgBurn with iso write mode.
In either case, make sure that you use good quality cd or dvd blanks; Taiyo Yuden and Verbatim are recommended by most of our members.