LabView 7.1 SIT: how can I modify the LV-Simulink connections during execution?

Hi!
I'm using LabView 7.1 (with the SIT toolkit) to make a user interface for a
Simulink model.  The problem I’m encountering is that the Simulink
parameters aren’t always linked to the same LV controls, depending on the options
selected by the user.  Since I wasn’t sure
if it was possible to do this, I decided to send the values of the main
controls into other controls, which would be hidden (or not if I can’t… doesn’t
really matter).  The hidden controls would
then be linked to the Simulink parameters, and the connections would never have
to change. 
It is quite
confusing to describe in words, so I’ve included a picture representing what I’m
trying to do.  It shows the way I'm trying to do it right now, with the hidden controls, but only the final result counts, so tell me if there's a better way to do it, or if it's just wrong.
For the moment, since
I’m not very good at using events, I just can’t figure how to connect the
hidden controls to the Simulink parameters. 
By default in SIT, the Simulink values are updated when the user changes
the value corresponding LabView control. 
Here, the values of the controls linked to Simulink are not modified
directly by the user, so it doesn’t update.
I hope my explanations are clear enough to be understood… if not, don’t hesitate to ask more details.
Thanks in advance!

I just tried to do what is shown in your picture, and it does update the value of the control, but the value is not sent to Simulink... I don't know if I'm doing something wrong...  I did some basic tests with the Sine Wave SIT example.  I added a control called "Frequency Simulink", which is updating each time the value of the "Frequency" control changes, using a local variable inside the event (like your picture).  However, the new value of the frequency isn't passed to Simulink.  I posted the modified version of the sine wave example that I used to test, if someone wants to try it.
Thanks for your answer, and please tell me if I did something wrong.
Attachments:
SITtest.vi ‏273 KB

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