"00save" is for the Unholy Grail Acheivement,as soon as you load the save,
you will start in the historical society building,all you have to do is walk into the next room or so
and the Obsidian Goblet Will sitting in the middle.

"01save" will start you in the hotel lobby, this save can be used to get a few things,nothing special.

"02save" is for the Warp Speed Acheivement,you will start right before the last two boss fights in the room
with a bunch of save points on the wall,right before pyramid head to be exact.When loaded the time will be at about 2.5 hours
therefore giving you about 30 mins to complete the last two fights which should be pretty easy with the inventory i had,
once you finish the game you will recieve the Warp Speed achiev. Enjoy!