Thanks very much for the quick reply 
Echo63 wrote in post #6092088
can you use your Cactus triggers via a PC cord ? your 5d has a PC socket on the left hand side of the body and if it can use a Plug in PC cord, or even a PC-Hotshoe adapter then you can fire your off camera lights
using Wein Peanut slaves on the off camera flashes will work too, and be a lot neater.
Thanks, tbh I just assumed that I could use either the hotshoe or the pc socket but not both. All I'd need for this solution then is a longer cable and a 5mm to 3.5mm jackplug adapter though I must admit I'm likely to trip over the darn cable knowing me
I like the sound of the Peanut slaves and would of course mean no trailing cable for me to trip on. Thanks again for the heads up 
Echo63 wrote in post #6092088
of course you are going to have to use your 580/rayflash in manual mode if your intending to use other off camera flashes.
if you grab a couple of 430EX or 550/580ex flashes instead of vivitar/nikon/sigma/metz units, you can use the IR wireless system (with canon ETTL)
Part of the reason for choosing the SB-24s is cost since I could pick up a SB-24 plus brolly, stand and flash stand/brolly holder for only a little more than just a bare 430EX. The other reason was I understand that using radio triggers is more reliable than an IR wireless system.
With regards to shooting in manual rather than ETTL I'm certainly no expert but I'm okay with having to work in that way in a studio, using my light meter to set up the lights so I reckon I shouldn't be any worse outside...I think! 
Cheers,
Chris
Canon 1Ds MkII | Canon 20D | Canon 24-70 f/2.8L | Canon 50 f/1.8 MkII | Canon 85 f/1.2L MkII | Sigma 150 f/2.8 Macro | Rolleicord IV | Canon 540EZ | Yongnou YN560