I've just read the postings to "Thanks to whoever made the suggestion!" and I'm reminded of a somehwat peculiar (to me) event. I have, quite by accident (because each device met the quality and budget contraints on me at the time), acquired a Panny plasma display, a BD30 BluRay player and of course my EH55. I purchased these all at different times (I live in the US, but, in fact, I purchased the EH55 in Canada as an "open box" item at London Drugs). All these devices are or can be controlled by the various Panny remotes. I've never consolidated them into one and having three the functions of which are not always clear drives my wife a little bit crazy from time to time.
Of course I've entered the "set" coding for each of the devices as separate set numbers. i.e., "Set 1", "Set 2" and "Set 3" to avoid the random opening of disc trays and turning on and off of devices not intended.
I inadvertently assigned the same set number to my EH55 and to my BD30 player and it seems that the EH55's tray, which is supposed to be manually opening only (no open/close button on the EH55 remote) can be opened if the set code for the BD30 and EH55 is identical. This is somewhat disconcerting and surprising because the EH55 supposedly has not the capability of remote tray opening.
In any event, I do code the three devices separately because my principal use of the EH55 tray is for dubbing from HD to DVD-R and I certainly don't mind walking across the room to work this occasional task.