Replacing a bonus skin with a dafalt game skin? In Xm-origins:wolverine

[the master$$$]

So i just got the game on pc(a little anoying with the low frame rate)and its freaking great(a little too gory but hey...)and i used the tehnique told by a member(by changing the code of the chekpoint)
But lets get to the point,it practicly says it all in the title lol,I want to replace the leggendary costume with the casino one,so i dont have to replace a hundread checkpoints.And so i wanted to know if its possible and if it is,how can i do it?