Sorry for repeating this. It looks like something happened to my previous thread.
I don't suppose anyone knows if it is possible to program external flash via the JTAG from the Keil environment for the LPC2478 processor.
I have done this in the past with the STR710 but this device has dedicated data, address and control pins for its EMI. The EMC on the NXP device has these pins defined as alternate functions which would probably only be configured once you have software running.