I've just slapped together a PC for backing up, and acting as central storage space. But i've got a cheap power supply running it and it doesn't have enough molex connectors to plug all my 5 hard drives and DVDrom in nor is it probably capable of powering them all if i could plug them in. Rather than buy an expensive power supply. I have another cheapish 300watt thing lying around here. Can i wire this up to run just the hard drives? I know if i short the earth and -ve out i kick start the power supply, but am i ok doing this while have the hard drives plugged in (im scared because theyre expensive - 400GB seagates). Is it also possible to wire it in such a way that when i press the power button on the computer it starts both power supplies?