Some people may wish to remove the Echelon intro for one reason or another, a major one being that the intro sometimes screws up the sound/music initialization in their rip of Unreal Tournament (making it emit a nasty screeching sound until a game is started).
(Following example applies to DOA2LE. You can use a similar method for the other games, but the file size will be different.)
1. Extract the 1ST_READ.BIN file from the CDI or your CD.
2. Fire up your hex-editor (I like HEdit or Hex Workshop) and open 1ST_READ.BIN, go to offset 0xF0000 and copy the Hex all the way to 983040 (the end).
3. Make a new file 1929928 bytes large, and paste the contents of the clipboard into it.
4. Save the file, and place it into a directory (ie, C:\SELFBOOTDOA2LE), and extract the data from the CD or the CDI file into that directory as well. Now just follow ECHELON's self-boot tutorial and re-image the CD.