Returning player content tunables?

Is it possible to unlock all the dlc on pc with tunable editor? If so, what are the strings for things such as:
Dodo
Kraken
Xero Blimp
Railgun
Hatchet
Duke o' Death (I am pretty sure this one isn't possible)
Valentines day clothing


It seem like almost anything ends up being possible with this game so far so I figured it was worth asking as I just spent quite awhile looking around.

I know you can edit your car (in ce) to a dukes and save it... you will not see it or be able to use it because you dont have this dlc(or something like that) would love to see someone figure out how to bypass this . Really want a dukes