X-10 operates differently. There are numbers, from 1 through 16, then there is "on", "off", "dim", "bright" and "all off". Separate commands for each light ID do not exist. So, everything is a macro. For instance, with the IR543 you could have:

* ID 1
* On
* 0.1 second pause
* ID 3
* Off

I have each X-10 command repeat three times (remember this is set under the "edit infrared command" screen).