To re-access the initial configuration menu at all times just type "set DrakeDragonRaceQuest.doConfig to 1" and wait a few seconds for the menu to pop up. Keep in mind though that you might need to reequip your clothing for changes to take effect when doing this in a running game!
Here's a list of all current configuration variables of the main control quest script (DrakeDragonRaceQuest). Access them the same way as the others or via the ingame config menu:
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"showwings" - want dragon wings? ("1" or "0"); Yes, you can select "only tail", "only wings" or "both".