I think I know the part he's talking about - I switched to modern Nintendo easy specifically for getting back up the wall jump area with all the lasers in the final section, but changing the difficulty did not do anything to make that specific section easier as far as I could tell. Not to mention the fact that sometimes the albino tentacle enemy will wander over close to the ledge while you're trying to complete it and then you have to do it in total darkness since you can't kill him until you reach the top (might want to prevent that - even though I did the whole rest of that section in darkness because I couldn't figure out how the hell to kill the thing, I imagine a lot of people won't like to play in the dark

)
Anyway on the topic of CGs, after trying to unlock boss CGs for quite a while I can't figure out how I'm supposed to do it. Always seems to give me a generic one no matter how I lose or what difficulty.