Mode simult ???

People, i know that you can play 2 or 3 sounds simultaneoulsly with the mode simult in the program screen, but it seems to work only for internal sounds...
Is there any way to do it with sounds from an other sampler, or a sound module ? can i make it on the mpc or must i program the layers from the sampler (an akai s950) ?
Thanks

No, apart from duplicating a track and assigning it to a different MIDI channel - in a way, this is a lot better as it gives even more control

thanks tutor! i'll try that