hi all i'm new to the fpga field

i was wondering how do i use the onboard sram, i need to create a bi
memory structure so do i just do:

type dataout is array (0 to 1048576) of std_logic_vector(15 downto 0);
signal mem_struct : dataout;

and the fpga knows what to do and where to save the stuff and then us
mem_struct as my memory structure or is there a way (a procedure) to us
the onboard sram or flash for what matters.

i hope i'm clear enough

if it helps i am using virtex 4 xc4vfx20 and xilinx ise 9.2, and i hav
512M scan disk flash and SRAM module (ZBT Synchronous SRAM) on the boar
itself
thanks in advance

regards
The Lord of War