Setting proxy settings for TSUNG

I am using TSUNG (an Erlang based testing ) tool for injecting virtual load on my targeted system to evaluate the performance benchmark/Stats of it but my targeted system(server) lies out of my local(corporate) network hence i am seeking for some proxy configuration within the TSUNG to hit its (targeted system's ) public ( internet facing ) IP ; however unable to get anything so far from googling.

Any help will be really appreciated !!

Thanks,