Also thanks everyone one for your help just glad its sorted now. (Well until i test tomorrow)
I may end up buying the 2000watt ibm psu anyway, thanks for the link for the breakout boards, this was the thing i was struggling with as my soldering isn't the best

Glad that went well

Ja the 2kw PSU's are great, lots of reserve margin with a S4 and enough oomph to push overclocking pretty high if desired. I'd think hitting near 3THs would not be unreasonable.
and of course 2kw is perfect for 3 of the S5's @ stock speed, maybe even goosed a bit...
Oh, re: soldering. When it comes to server power supplies and their associated wiring the most common problem is using a soldering iron that is too low wattage (most are 25-35w). Due to the heavy wiring and large PSU contacts being very good at sucking the heat away you need at least a 65w iron with large flat tip for fast & decent joints