He is known for his involvement in the envisioning and development of James Joyce's Ulysses as hypertext and hypermedia with William H. Quillian and other scholars from around the world.
It was founded by Karapetkov, Stein, RDT Artistic Director Krustyo Krustev, and American dramaturg Benjamin Nadler, with the partnership of the RDT, the Krastyo Sarafov National Academy for Theatre and Film Arts (NATFA) in Sofia, The HyperMedia Studio at the University of California, Los Angeles, and the University of Zagreb's Academy of Dramatic Art.