Once you buy a flame, you cannot edit it any other color/setting. You'll just have to buy/forge a new one.
i dont think he wanna change the flame it self he want to know how to decativate the practicle text well deactivate the practicle in ur inventoy aftter thet go to my comp > c > games > tb > custom > find ur folder then delete the file named flame.tga it should work also u can try to type ingame /dl uke wich may work too hope i helped