Job Allocation using GUI Control

Thanks for everyones help on my previous GUI question.

However I have another GUI question. I would like to be able to allcoate tasks to different transporters using a GUI Control.

I have set up a simple model as an example. The model has 2 transporters (on the same desptacher) and 2 processors the processors call for transport based on a reference to a particular cell in a table. There is one for each transporter. I would like to be able to alter which transporter is used for each processor using a GUI control but I'm unsure of the easiest method.

Ideally I would like a drop down box with the two options for each processor but I'm unsure whether I can reference the transporters directly from the GUI or is it best to set a variable that corresponds to the table row?

I'd set the port number in the table and then use that port number to reference the objects. It is simpler than using a number pointer or a direct reference. Then it is easier to have the GUI just set the number in the table using the itemcurrent of the combo boxes.

The OnOpen of the GUI reads the table and refreshes the GUI so that it shows the right thing when you open it, and each combo box's OnSelect sets the table based on what you chose.