I assume you used the "ISP protection" feature, else you could throw it to the bin.
In case the boot code is still working (flash memory area 1E00-1FFF),
you should be able to connect to the MCU and read out any data FM can handle. If not, you need to check your hardware which enables ISP mode.
The first time you program the LPC932 it is already in ISP mode.
The next time it has to be put to by using a parallel programmer or a hardware like the MCB900, which FM can control via serial port to generate pulses at RESET pin.
All this is described in various manuals. The one of FM and the app note of flash programming the LPC series, available at Philips.
I have built after the MCB900 hardware on a programming and testing board and it works fine with FM.