We use the fix page to identify these waypoints. For the EEP and EXP we put 394 nm (with winglets, 388 without) rings around the designated airports. For the ETP we build a waypoint in the temp nav database using the Lat/Long from the release then add it as a fix. Once we have done the fixes, we verify their positions on the map display by cycling through the waypoints in the plan mode.
We use fixes because we do not add non-navigational waypoints to the legs page for an oceanic segment.