PC grow wiring questions

Is it possible to wire CFL lights and fans to a power supply? This is the only way I could grow because a random wire coming out of the case would stick out and be obvious. I want to be able to use that connector wire that goes from the wall to the back of the pc. Is there a way to make a false power supply adapter? (SEE PIC)

If not, how could I adjust the power supply to supply power to a power strip inside of the PC?

Sure, inside the case where the power cord plugs in you can tap into the 2 wires and either put a plug or hard wire it.

Im wanting to wire mine up with the original pwr cord also. So, i gutted the pc pwr supply and i left with this (in pics). Im not sure what this thing is...do I wire it up as is. Or do i need to take this thing off??

What I did in my PC box was remove that female connector part you have circled in red, and ran a power strip (mounted inside the case) cord thru the hole. I cut the connector in half, and glued it back in place, around the cord (cause you can't fit the prongs through otherwise). Then, to make it look like a real power cord, I split and glued that knobby part on the end of a real computer power cord around it. You can buy this piece in the electrical section of the hardware store. This would be better with a pic, but it ends up looking like a normal PC power cord coming out the back of the PC. You have to really look closely to see the doctored cord.