db presses and flys are two very different things, do a google search and you will find plenty of examples.

I see no problem in putting in db presses for bb presses, but you most likely wont see the same size/strength gains you would on bb press.

__________________
I don't do this for my family, my friends, women, accolades, pride, or ego. I do it for me and no one else, its just part of who I am.