Hi Ben,
I believe you may need to use SoapUI to generate requests, then use LoadUI with a SoapUI Component to run the load test (unless they are very simple requests, in which case you might just us the Web Runner component).
To achieve such high load I would suggest you use at least 10 LoadUI Agents.
To do this, create a scenario containing a Runner (Fixed Rate or Ramp) connected to a SoapUI Runner, then deploy the same scenario to each of your 10 agents (don't forget to run the test in distributed mode).
Distribution, however, is only available in LoadUI Pro.
Best regards,
Renato
