AFAIK the ST version cannot be used as either a master or a slave in a wireless set up, but the Super version can, but you'd need to doublecheck as Canon stuff is a mystery to me at the best of times
I don't think the 430 can be used as a master. Ideally you need the 580ex to act as master. You could always try using a set of flash radio triggers but bear in mind you would loose TTL
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