Noob Trying to Program Auditory n-back task

[Shawn Byron Beckett]

Hello, I am a complete E-Prime neophyte (a summer student), and so could 
use a bit of help to point me in the right direction.

My experiment is composed of two (simultaneously presented) activities, to 
study the effects of divided attention:

1)
I am trying to run an auditory 2-back task, where the Subject hears words 
belonging to different categories (e.g. ANIMALS, FRUIT, JOBS) at a specific 
rate (e.g. 1 word every 2 seconds).  If they hear a word from the same 
category as the one presented 2 prior, they hit "Yes." Otherwise, they hit 
"No." 

For example, the sequence [WORD(correct response)]:
COW(no) DOG(no) PEAR(no) LAWYER(no) BANANA(yes) PLUMBER(yes) NURSE(no)
In this sequence, "banana" and "plumber" are both preceded 2 back by other 
items ("pear" and "lawyer" respectively) that belong to their same 
categories.

2)
The difficulty with this is that I am going to have another task running at 
the same time, which is a visual task that is also presented in E-Prime. 
The Subject will have to discriminate between large and small objects 
on-screen, in which the correct answer must be given before progress can 
occur. The length of time that the Subject will be performing this task 
will be set by the length of time allotted to the auditory task above. So 
the whole procedure will be over in say, 1 minute.

I am not sure how to model these, since they are two different tasks, 
ostensibly running on two machines, that would need to be syncronized so 
that they start and stop at the same time. Any ideas on how/if this is 
possible would be very helpful!!

Thank you,
Shawn

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