How to do multi-instrument with EXS instrument in Logic Express

Hello Logic Express Users,

I wonder if someone can help me. I can set up multi-instruments with Battery 2, and Kontakt 2, but I am battling to set up a multi-instrument when I am using the EXS with Logic Express. How do I assign the outputs to different outputs so that I can hear different instruments through different aux channels.

Or is it only possible with the EXS editor that comes with Logic Pro? Because if it is then it is weird why they make the EXS with Logic express a multi-instrument.

Thanks in advance for any help.