It is not possible to schedule Hotlinked Module instances so some other solution is needed.
I would probably try to do this with a GDL Object.
I would create a simple GDL object and I would place it in each Hotlink Module source file.
Its 2D could be a simple hotspot so no graphics would appear in any Viewpoint.
Then you would be able to Schedule only instances of this GDL Object.
The GDL Object could have parameters that would be set to these values you want - e.g. a parameter for the X coordinate of the GDL Object, another for the Y coordinate. Then you would set these objects parameter to be listed in the schedule.
You might give it a go if you know some GDL.
What I don't know is whether these parameters would return the X, Y coordinates, etc. within the source file or the host file in which the source file is placed as Hotlinked Module, you would have to try that.
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