Using a single instance of a VSTi synth in Project 5?

Since I'm new to P5 I wondered if anyone could guide me in the right direction I have Proteus X and like to use a number of its presets. In Sonar 4, I just create a single instance of VST Proteus X. It has 32 midi channels with a different instrument assigned to each channel and all channels can be used simultaneously. When I want to play multiple instruments on multiple tracks, all I have to do is use the single instance of Proteus X and simply assign a different midi channel to each track. Theoretically I can get 32 tracks of midi from a single instance of Proteus X. I can't seem to figure out a way to do this in P5. I keep having to greate a seperate instance of Proteus X for each track. Obviously, every instance I create simply uses a lot of extra resources that would not be used if I could use a single instance like I do in Sonar. Any suggestions would be appreciated.

Thanks b rock. I'll see if I can figure out how to make this work from your instructions and report back. Note that when I mentioned the 32 tracks I used the word "theoretically." Proteus X is no light weight when it comes to CPU resources and I would run out of CPU power long before I reached 32 tracks. I can try simply using a few instruments in channels 1-16 and 17-32 simultaneously, but you are right in assuming that if I was doing midi input and not just playback, I would need a second midi port. I'm not sure what will happen with just playback. I'll give it a try and see. Thanks for the help!

I want to use an instance of one that already exists in a previous track. What am I missing here?

You need to right click on the VSTi and add a Layer for each midi channel you want to add. Check out the help file for "layers". I do this all the time with the TT1. Once you get the hang of it, it's fast and works well.

BTW: Using Proteus X as a VST allows only 16 channels if I am not mistaken. Only standalone mode allows 32 channels.