In reply to Craigyboy13:
> but i couldnt understand why we couldnt just put the ropes ( we had 2 singles) throught the cord?
If the cord is good (check it, all of it) and what it's attached to is good (again, check it carefully) you can. If you're not sure about any of it, back it up or change your plan.
The vitally important thing to remember is that you ab, not lower, the rope must nor move over the cord once loaded, that includes ensuring you feed both strands through the belay plate at the same rate as you descend. Clip a krab or something to the strand to need to pull to retrieve the rope, saves forgetting which is which. Oh and as usual make sure you can't accidentally go off the ends.
jk