[rutslegolas]

no i do not think that if denethor had the ring he would be under the control of the dark lord as kransha says

i think if he had the ring the madness would'nt have possessed him and he would fight the seige of gondor himself.
and if all else would have failed he would have used the ring himself and then fight the siege and would have wrenched the palantir out of the dark lords control.
and then maybe perhaps he would have overthrown the dark lord.

thats just what i think maybe it is wrong.