Ok

,
I don't know if you guys all understood what I meant (although most of you did).
I had meant that oro would revive a body, then use the new body as his host by taking control of the body. He could make who he revived submit to his own will and he could have revived an uchiha. If Kabuto had access to the DNA of Madara Uchiha, then I am pretty sure that Oro could have gotten hold of Uchiha DNA (Even if he had to infiltrated the village and steal the uchiha DNA from the grave of one of the many uchiha killed in the massacre).
In regards to the cursed seal aspect - if a shinobi needed to have the cursed seal for Oro to inhabit the body, why didn't he just kill kimimaru for kimimaru's body (before he learned about Sauske)? I don't think his host needed to have the cursed mark... When he found used the prisoner as his host when Sauske did not get there soon enough, I doubt that the prisoner had the cursed mark (There were so many prisoners in the brawl, I doubt all of them had cursed marks).
I do think you guys are right though about his cells dieing from trying to inhabit a dead body. Thanks for the feedback
