Better secondary bootloader handoff found here http://knowledgebase.nxp.trimm.net/showthread.php?t=2869

handoff.c

// a supposedly better way of executing secondary program
static void boot(uint32_t a)
{
	__asm (
		   "MOV.W   R0, #16384\n"
		   "LDR SP, [R0]\n"
		   "LDR PC, [R0, #4]\n"
		  );
}

static void delay_loop(uint32_t count)
{
	volatile uint32_t j;
	volatile uint32_t del;
	for(j=0; j<count; ++j)
		del=j; // volatiles, so the compiler will not optimize the loop
}


static void my_execute_user_code(void)
{
	uint32_t addr=(uint32_t)USER_FLASH_START;
	// delay
	delay_loop(3000000);
	// relocate vector table
	SCB->VTOR = (addr & 0x1FFFFF80);
	// switch to RC generator
	LPC_SC->PLL0CON = 0x1; // disconnect PLL0
	LPC_SC->PLL0FEED = 0xAA;
	LPC_SC->PLL0FEED = 0x55;
	while (LPC_SC->PLL0STAT&(1<<25));
	LPC_SC->PLL0CON = 0x0;    // power down
	LPC_SC->PLL0FEED = 0xAA;
	LPC_SC->PLL0FEED = 0x55;
	while (LPC_SC->PLL0STAT&(1<<24));
	LPC_SC->FLASHCFG &= 0x0fff;  // This is the default flash read/write setting for IRC
	LPC_SC->FLASHCFG |= 0x5000;
	LPC_SC->CCLKCFG = 0x0;     //  Select the IRC as clk
	LPC_SC->CLKSRCSEL = 0x00;
	LPC_SC->SCS = 0x00;		    // not using XTAL anymore
	delay_loop(1000);
	// reset pipeline, sync bus and memory access
	__asm (
		   "dmb\n"
		   "dsb\n"
		   "isb\n"
		  );
	boot(addr);
}