Adding 2 session to my key

hey,



i already have a 3 sessions lifetime key and i wanna add 2 additional keys so i can run 5 sessions udner the same key. Now i wanna ask if that´s possible or do i have to buy another 3 sessions lifetime key?



and if i do have to do so, can i merge those 2 keys into one key?

Adding 2 session to my key