To answer your question the reason why there's been no development is because Mike has left to pursue his own business interests, photography as I understand it.
Ah I've just seen your MOBO, you don't have onboard graphics.
Can you clear CMOS and yank the card out anyway, power it up without being able to use a display, does it still shut down after 3 seconds?
Remove ALL but 1 stick of ram (make sure you check the manual to see which slot to use with 1 stick)
Remove ALL HDD/DVD EXCEPT the primary boot drive
Remove ALL USB devices EXCEPT keyboard and mouse
Remove ALL PCI devices INCLUDING your graphics card
You said you don't have the right...
Basically jump starting your PSU by bridging certain pins on the 24pin connector, by doing so you can prove your PSU is at least alive. Also handy if you're into watercooling and other lovely things.
Seasonic, XFX and Corsair but really you're primary choice should be Seasonic as they make all the decent ones for XFX/Corsair. I've seen a fair amount of negative reports for certain Corsair models lately although none that are made by Seasonic. But using your example I can't understand someone...
Do you have access to another monitor or screen, what sort of connection are you using, DVI, HDMI or DisplayPort? You need to rule things out and try using the onboard, no point spending money when you may be spending it in the wrong direction.
Do you see any options to boot into BIOS?
You say you've removed everything but can you tell me exactly everything plugged into your motherboard?
EDIT: You say you've put in a HDD because you've recently got Windows 8, did you install Windows 8 on the additional drive? What did you do with...