Is an ir543 all I need to contol a PCS SMARTSWITCH 1000W SWITCH. Will this dim and create seens using my pronto. Thanks, Jeff

You'll need a remote control with the IR X10 commands installed.

You'll also need a controller (like the PHC02) to set up Scenes:
[Link: homeautomationnet.com]

Set the switch and the IR543 to the same HouseCode(A/B/C . . .Etc.).

Use the remote commands to turn on or dim the lights wired to the SmartSwitch, first select the UnitCode (1-16), then send the Command( on/off/dim. . . etc.).

If you want to use your remote to control more than one HouseCode, You will need a IR543AH, and a remote that can handle the 'special HouseCodes'.
[Link: homeautomationnet.com]

Thanks for the reply. Since I have a ir543 and it is set up for my pronto It seems I should be good just to on/off and dim? If I want to make scenes I need that part that you suggested? I think I understand. Thanks again