Recording reaction times for two responses on same trial

[Sean]

Hey there, 
I am creating an experiment that tests sustained attention. One of my 
conditions involves two participants taking the test at the same time, 
using two different sets of keys to respond. The first participant will be 
responding with the (either) keys 1 & 2, and the second participant will 
respond with (either) 3 & 4. I want to be able to see which button was 
pressed from each participant on that specific trial, and each of the two 
reaction times from each participant on that specific trial. 

I downloaded the 'Multiple Response Collection' Sample experiment from the 
PST website so I can see that it is possible to do, I am just having 
trouble implementing this into my project. I think it might have something 
to do with specific instructions on an InLine slide that involves 
programming codes, but I cannot figure it out. 

I am attaching what my project looks like so far. If coding it is the 
solution, can anybody help me in this specific case? 

Thanks for the help

<https://lh5.googleusercontent.com/-HrOtE1B4tLY/UCCy8Um_WaI/AAAAAAAAACY/bURBi8u7tec/s1600/Experiment+Picture.png>

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