Multitrimbal instruments

Hello,
i have really tried to find how i can use Multitrimbal instruments on Cubase LE 5 version…
I can not find any vst instrument on devices menu (F11)…
what can i do?
i have tried to make midi tracks and send the midi at chanels and the vst to take the midi from these chanels but this doesnt work…

You can’t, limit of the demo version. Stereo out Instrument tracks are the only option for VSTi’s.