I tried the same thing (force the bootloader to be invoked from the software) without success. I gave up after some tests.

What I wonder is: in the FLIP software you see the Device SBV as "FC" (if I remember correctly). Changing this Vector (equals High Byte of Bootloaders Address) you could start at a bootloader startaddress of your own. So you might give it a try instead of invoking 0xf800 0xfc00. I know the manual tells differently..

good luck

Werner