Changing sealed packs?

Hey guys! I'd just like to ask if there's one of you guys who has got the time to help me out? I'd like to change the kind of boosters you can get for a sealed deck. Case in point: I'd like to make a sealed deck out of 6 DKA boosters, but I'm not given that option. Is there any way for me (a guy with minimal knowledge of coding) to achieve this? Any and all help would be greatly appreciated!
/Arthur.
/Arthur.