Is it possible to add Exim to existing VestaCP installation?

[arielmonaco]

Hi everyone.
I need help about this. I installed VestaCP without mail support. Right now, I need to install Exim. Is it possible to add through the VestaCP installation wizard? I need to backup all before do it? Or I need to install manually Exim and then integrate to VestaCP?
Thanks in advance.-