I am trying to solve a problem ...
My system is as follows -
Hitachi 50" plasma w/ the Hitachi control center box the remote is rf,
Scientific Atlanta explorer 8300HD cable box the remote is ir
Bose lifestyle 24 surround system the remote is rf,
Sony CD/DVD DVP-NS575P remote is ir
Panasonic VCR the remote is ir

The entire mess of it is housed in a cabinet purchased just for it all. I even tested the Hitachi remote to make sure that it would work through the 1 inch door and it does, (we were told that everything would go through the Hitachi control box and we could use that remote for all. The problem is that the tv goes through the cable box which is ir and does not work through the 1 inch door. So we now use a remote for each item and the door must remain open all the time so the SA cable box will work. Question 1 - is there a remote that will control all of these devises or at least the first 2 or 3. that will control both ir & rf?
Question 2 - if not, I have found a device that converts ir to rf, can I use that or something like it on the SA cable box and at least get to keep the door closed. And with that device inplace can I use the Hitachi rf remote to control the SA cable box? At this point I don't care what it costs I just want to keep the doors closed and eliminate some of the remotes. Thank you for any help you may lend. DLind

There are a multitude of ways you can cross your bridge, but first we need to know if your Hitachi remote is strictly RF similar to the old bose systems for audio. Then we can address how to solve your problem.
One way to do it with your cabinet and using more than one remote, or if your Hitachi remote is both IR and RF would be to install an IR repeater system, which are made by companies like Niles, or various others.

Based on what you have described it sounds like the Hitachi remote operates both in the RF mode for the Monitor itself, and in IR for any attached components. To confirm that you will need to open the cabinet and check to see if the Hitachi controls other items with the door open. If it does then you know that it is IR capible.
Also you need to check the literature for the Hitachi and see if it has any IR blaster outputs, which will conect to a 3.5 mini jack on the monitor and the blasters (which should have been supplied) should be strategically placed in front of the other components IR receivers.

Feel free to e-mail me with more details if you have not already solved the problem

Check your thread in the CI lounge area.