The Spartan-3A DSP Starter Kit includes the Intel S33 64M SPI Flash device, which iMPACT does not support. How is this device programmed?
There is a utility based on the XSPI utility that is a command line utility to program this specific SPI Flash. This utility will be available on the Spartan-3A DSP Starter Kit Web page soon.
If you need this utility before it is available, contact Xilinx Technical Support.