2 Power supplies in a system…how-to?

Hi,

I have searched this from couple of days on the net but still not found what I want to do….

I just want to know that can i add 2 power supplies in a system running simultaneously & dividing the components of the system on these 2 power supplies………?If it is possible, then how can i do this……connecting the 2 power supplies to mainboard & when press the power button from one power supply the 2nd power supply also on by doing this………..?

Any help / info / idea………..?

if my question is not clear or need any further info then let me know……….

Awaiting helpful reply as always….

Regards / Sulman