According to the website I just consulted, this plant will not propagate from "seed". http://davesgarden.com/guides/pf/go/2863/ It must come from cuttings.
That page indicates one way, not the only way. My search found:
Roses do grow from seeds. However, the resulting plant may or may not be identical to the parent rose bush, depending on whether the rose is a hybrid or heirloom, sometimes called old roses.
Read more: Grow Roses - How To Information | eHow.com http://www.ehow.com/grow-roses/#ixzz1OotzKeP5