[Koha-devel] displaying book cover

Dear All, I have installed Koha 3.00.03 on Debian-Leny in my organization and I am trying to display book cover. Here I want to mention that my organization has old Nepali monographs which do not have ISBN so I try to first display book cover default on making some changes on opac-detail.pl and -- With Regards, Vijay Kumar Shrestha