President Barack Obama's commission investigating last year's oil disaster is giving environmental groups hope that some change is on the horizon, but not the full scope of what they're looking for, two groups told CNN Thursday. "If you take the findings to heart, you wouldn't start drilling again," said Kert Davies, research director with Greenpeace...Greenpeace and the Sierra Club told CNN there were no surprises in the released chapter...[Davies:] "We don't have very high hopes for the reforms that should happen -- a massive overhaul of the regulatory apparatus and oversight."...Halliburton issued a response, accusing the commission of having "selectively omitted information we provided to them."...Transocean issued a statement saying its crew had taken "appropriate actions to gain control of the well..." BP spokesman...said...the oil giant "has cooperated fully with the commission's investigation"...