Hi DdlV,
Thanks for your reply!
Strangely, the manual does not have a search field, which makes it extremely difficult to find instances of words.
Still, following the words you suggested I actually arrived on the page:
http://zorro-project.com/manual/en/export.htm
where the subsection "Simulating a different broker account" seems to answer my question.
I will give it a try later today!