Though it's a much later issue, I would remind you to really double check everything to make sure there aren't major goof ups like in the first game's patch, like how the Ch 15 boss doesn't carry the right item to drop when the english patch is applied
Oh wow, I didn't even notice that. FYI, it's not especially hard to fix the item numbers after you import the save, but you have to mess with Cheat Engine a little. Not really an ideal solution, but it works.
Unequip all of your Nails, then run Cheat Engine and scan for the Nail number (Value type is Double), equipping them until you pinpoint the exact value, then just lower that by 1 to remove the extra you got in the English patch. Then manually add an address (Value type is still Double) that's 18 higher in hexadecimal (
Calculator here) than the Nail's address and raise its value by 1. For example, I got 0D6CE548 as the Nail's address, so the Fang was 0D6CE560. The distance between the item addresses is always the same, but the addresses themselves can vary, so don't just enter the example I gave. Scan for the Nail's address yourself.
The Fang won't appear ingame at first, but as soon as you save and reload the game, it'll be in your inventory. Save to a different slot at first. There shouldn't be any real danger of screwing anything up, but better safe than sorry.