One question I have is are the wires coming from the ATX PSU heavy gauge enough to drive the Toaster cards and Cyberstorm etc?
unfortunately nope.
Too thin for a overloaded system as yours (and mine also)
I've purchased some Amp (well actually are tyco Electonics) 6 ways "Mate-N Lok" series connectors (code 1-480704) to achieve a more stable power conection with ATX PSUs.
RS-Components code- 848-874
Male pins sold separately.