Do you have an application note or an user guide or an example that describes how to use the quad page programming (1024 bits) for the MPC574xP family ?
For information, the embedded flash memory is C55fmc.
it is written for MPC5748G but the procedure is the same. First example shows how to program the flash using pure C code, second example is doing the same but SSD drivers (mentioned by Aleksandar above) are used.