Hi,
I recommend Smartshooter, its a lot cheaper and works fine for change settings on a multicamera rig and downloading images.. unlimited cameras with a single licence, so a lot cheaper than Breezesys.
You should use a your 2.5mm connector to synchronize the cameras, there are several devices available so called triggerboxes.. shooting via USB is not recommended ! ( esp. for moving objects..)
I always had troubles with long USB cables, esp. if you connect them to a USB hub.. also you should think of using a network of 2 computers with 24DSLRs... 12 each, might be more reliable, depending on your hardware(USB controller...)
hope that helps, I am using a 50DSLR ( Canon 600D and 1100D mixture), which works fine, but some of the settings I had to learn after a quite painful ( and cost excessive) trial and error phase.
good luck, fabberlounge from Vienna