when you applied the first time, did you contact the schools to ask about the weaknesses of your application? If it was something like improving your gpa, dat, or extra-curriculars, and you have improved in that area, then i guess you could use the same ps and letters. But if you didn't contact the schools, then you really don't know what got you rejected- it could have been your ps or loes. Whichever case it is, i don't think you should flat-out submit the exact same stuff; you should at least take a 2nd look at everything and perhaps update/improve your ps and maybe ask your professors to also update their recommendation letters. Good luck.