Delta's alias doubling tool is not a setParam plugin, and is meant to be used by itself separately.
Put doub_alias.exe in the same folder as the oto.ini you want to edit. If you have custom settings, make sure that doub_alias.ini is also in the same folder. Drag and drop oto.ini onto doub_alias.exe and it will add the extra aliases to the oto.
To add a finished voicebank to UTAU, move it to the "voice" folder inside the UTAU folder. To add a finished voicebank to OpenUtau, move it to the "Singers" folder inside the OpenUtau folder. The individual voicebank also needs a file named "character.txt" with the line "name=(name of voicebank)".