An eaiser to use SD library

Using Arduino Storage
2

I'm trying to use your library with the arduino spi library. sorry to bother you again but can you please help me out with the code?

#include <SPI.h>
#include <SdFat.h>

int CS_pin = 8;
int DCS_pin = 9;
int DREQ_pin = 7;
int XRST_pin = 6;
int MP3_CS_pin = 10;


SdFat sd;
SdFile myFile;
byte dat[10000];
int index = 0;

void setup()
{
  Serial.begin(9600);
  pinMode(MP3_CS_pin, OUTPUT);
  pinMode(CS_pin, OUTPUT);
  pinMode(DREQ_pin, INPUT);
  pinMode(DCS_pin, OUTPUT);
  pinMode(XRST_pin, OUTPUT);
  
  

}

void playSong(){
  for(int i = 0; i < index; i++){
    SPI.transfer(dat[i]);
  }
}

void loop()
{
  digitalWrite(MP3_CS_pin, HIGH);
  digitalWrite(CS_pin, HIGH);
  digitalWrite(DCS_pin, HIGH);
  
  delay(100);
  
  if (!sd.init(SPI_HALF_SPEED, MP3_CS_pin)) sd.initErrorHalt();
  
  // re-open the file for reading:
  if (!myFile.open("song1.mp3", O_READ)) {
    sd.errorHalt("error opening song1.mp3 for read");
  } 
  Serial.println("song1.mp3:");
   
  int data;
  while ((data = myFile.read()) >= 0){
    Serial.write(data);
    dat[index++] = data;
  }
  
  myFile.close();
  digitalWrite(MP3_CS_pin, HIGH);
  
 SPI.begin();
 
 SPI.setBitOrder(MSBFIRST);
 SPI.setDataMode(SPI_MODE1);
 //max SDI clock freq = CLKI/7 and (datasheet) CLKI = 36.864, hence max clock = 5MHz
 //SPI clock arduino = 16MHz. 16/ 4 = 4MHz -- ok!
 SPI.setClockDivider(SPI_CLOCK_DIV4);
 
 digitalWrite(XRST_pin, LOW);
 delay(100);
 
 digitalWrite(CS_pin, HIGH);
 digitalWrite(DCS_pin, HIGH);
 digitalWrite(XRST_pin, HIGH);
 delay(5);

 // CHIP Write
 // sets sci_mode register, SM_SDINEW, SM_TESTS, SM_STREAM.  pg 25, 26
 byte aux;
 digitalWrite(CS_pin, LOW);
 delay(1);
 SPI.transfer(0x02);  //write command
 SPI.transfer(0x00); //SDI_MODE register
 //extract and send higher byte of data
 //0x0400
 aux = 0x08A0 >> 8;
 SPI.transfer(aux);
 //extract and send lower byte of data
 aux = 0x08A0 & 0b11111111;
 SPI.transfer(aux);
 //wait for the chip to finish executing command
 while (!DREQ_pin){};
 digitalWrite(CS_pin, HIGH);
 delay(1);

 // Start SINE test
 digitalWrite(CS_pin, HIGH);
 digitalWrite(DCS_pin, LOW);
 delay(1);
 
 playSong();

 delay(200);
 digitalWrite(DCS_pin, HIGH);
}

sorry to bother you so much but i've been at this for like 2 weeks now and im super frustrated >.<