Single Midi track, multiple VSTi's?

I'm re-familiarizing myself with Reaper. How do I go about routing a single MIDI track to multiple VSTi's? For example, I've got a Battery kit of close mic'ed drums, and another kit with room mics. I'd like to send my MIDI drum track to both instances of Battery simultaneously. I'm sure it's easy, but I'm missing it.

Use sends. Send midi to tracks you want and that's it. Just click on "io" button, it should all make sense then :)

That was too easy. Thanks.

or multiple tracks armed to the same incoming midi signal

You can also stack mutiple vsti on the same track. Uncheck "Allow VSt to send/modify MIDI" if a synth doesn't let the MIDI thru. You can even use the % knob for mixing them separatly. Not as flexible as a modular host/sub host, but it can be interesting in some situations. Makes it also easier to save/recall the whole rack.

I can find this "Allow VST to send/modify MIDI" checkbox. Could you please help me and tell me in which menu I'll have to go ? A screen capture would be great. I'm trying to figure how to stack my drums plugins as before. Thanks

... oops, too late :)