keep the file "data00-1.bin" remain the same (means you need to export your save via jksv, and don't change anything on data00-1.bin, replace the rest files), then your name won't change, but all the gears will be there as the save you downloaded. i tried.
I found out how to change at least your character's name (doesn't work for Palico or Palamute).
Make a new save on Slot 2, name your character what you want. Change the data001Slot.bin to data002Slot.bin from this save file. Replace the file in your 0 and 1 save folder. When you load the save you'll have your character's name but all the features the save has.