Huh? Didn't Capcom say they wouldn't make a mandatory install, because of the backlash they got from DMC install?
EDIT: Oh well
"But what about the dreaded hard-disk install for PS3 owners? "We're still working on those technical elements in the last couple of months, but we can tell you that if users are dissatisfied with that kind of thing, then it's certainly something we keep in mind when we develop. We'll do our best to come up with something that users will not criticise, but love...""
http://www.eurogamer.net/articles/resident-evil-5_0_7?page=2