Problem when for program and data memory use SDRAM

I have a PowerPC (Virtex2PRO) and SDRAM (programm and data memory). I
anderstand that the bootloader may be use to load programm from
systemACE or FLASH Memory. But I whant load programm from
configurePROM to SDRAM. Is it possible? Somebody help me?

May I use SPI Flash to fixed this problem? Xilinx reccomend External
Memory Controller to connect Flash, but I am not see in "IP Configure"
SPI FLASH to connect to EPC.