Yes, we need a remake of Dracula's Curse. Not all CV fans have a neither an NES nor like using emulators. From what I've seen on youtube videos, it is a great game and there should be a remake on PSP. As for any changes, I would give it the graphics of SotN with the remixed music of all the songs in CV3. I would also add voice actors for the few cutscenes and add some in regards to the battle against Dracula. For example, there would be a different cut scene for every combination of characters: Trevor alone, Trevor and Sypha, Trevor and Alucard, Trevor and Grant. Plus, I would also add and unlockable feature allowing players to play the original game.
One last thing, I would make a complete soundtrack available on iTunes like with DXC that has all the music both as it was in the original CV3 as well as the remixed versions, plus some bonus songs.