My experience with X-10 devices and ISY is that X-10 devices do not have capability to communicate like Insteon devices and they do not display in the list of installed devices. X-10 devices will be discovered, however, and I was successful in writing simple programs to say turn a switch on and off. You can then "run" that program in other actions to include the switch in a more elaborate scheme. This approach also worked after migrating to IoP. X-10, however, is power line only and requires an AC PLM or a dual mode Insteon device to relay the signal. My PLM failed and I replaced it with a USB PLM and since then, I have lost communication with my 2 remaining x-10 wall switches.
