OK - I downloaded the editor. The list of possible actions does include "entering."
I had done this before, but did not delve too deeply when I could not find out what I wanted to from the Help file which is included (but empty

)
This time did find the "actions folder" for sounds - this was the first time i had used the program for sounds.
So now my soundsinfo.conf now contains the following line:
custom_254.entering: teleportersound2.wav
There is no other reference to custom_254 in the sounds info.conf file - hence there are no re-assignments made after the above line from soundsinfo.conf.
The .wav file is on the proper directory.
The custom_254 is the custom element that I assigned to be:
custom_254: L-4-Teleporters.pcx
custom_254.xpos: 0
custom_254.ypos: 2
custom_254.frames: 10
custom_254.delay: 3
In my graphicsinfo.conf
And... nothing happens still!
There is something I need to ask.
I assigned custom_254 to be the teleporter graphic in graphicsinfo.conf. Since i use multiple transporters to different locations on a game screen, I assigned CE1 and CE2 - from within the games level editor, to use the graphic of custom_254, ergo they look look transporters.
Does the sound file associated with custom_254 in soundsinfo.conf get triggered when a player enters CE1 that is set to use the graphic of custom_254? Or will the graphic just be used by CE1 (and CE2) and the soundfile not play when the transporter is entered?
Just in case this was what happens, I also, as a test, put CE254 on the screen, assigned it to be able to be entered, and I still got no sound!
All that I know about CE's I have gotten from playing around with Alan's graphicsinfo, etc. I am sure there are a lot of holes missing in my ideas as to how things work (such as the question above). The documentation that is available is helpful to a degree, but I have run into enough problems figuring out what i do know that I did not want to use the ConfEdit program (especially when i saw the help file was not done) since i figured it would only pose more questions than it would answer.
I guess my evaluation is wrong and i should poke around with it for awhile?
Thanks for any and all help.