Here is an update. Thanks to PK I have set up Vixen to "sync" programs on 2 computers. It will start the sequences together, but by the time the sequence is partly through, they are out of sync enough to tell. I assume that it is the difference in the speed of each computer, but I don't know. So I have continued looking for a solution. And I think that I found it.
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Login. Since it had a free trial, I thought that I would give it a try. AND IT WORKS!!! I have done some initial testing between 2 computers on my network, one of which is a laptop using a wireless router. The software is almost to easy to set up. Just install the "client" on your show computer and the "sever" on your remote computer. On the server, it automatically finds all of the connected USB ports. Of course one of them is the USB dongle flashed with PixelNet. Once that is set (the complete installation takes less that a minute or so, you go to the client. Of course on the client you already had to have set up your USB dongle and of course it has a com port assigned. You just leave your show software set up the way it was. You start the client on the show computer and tell it to connect to the USB dongle on the server computer (the list is automatically populated. No searching. Once that is done, the software communicates over the network and looks to the show software just like a com port. This was so easy to set up that even I could do it!! I have only run an initial test with one 128 node string and it worked flawlessly. I have 9 more strings that I will load up and give it a good bandwidth test. I will let you know how that goes. The only drawback to this is the cost. It costs $149 for the software. The paid version lets you connect to more than one device at a time. So, depending on bandwidth, you could probably have multiple PixelnNet universes. But I think that this may be my answer for this year.
Jim