Burning 2 films to 1 dvd

:bow: :bow: :bow:
i am using nero 6 ultra on xp. thanks to previous help im burning nicely. however i have dual layer capability and want to get 2 films on one dvd. theres plenty of space on the dvd but i cant get nero to do it. i know im being dim and there is a probably a really easy answer, but iā€™m dammed if i can work it out. it may be something to do with the films having the same
vts ??? files. HELP!!!
:cop: nice simple instructions please. i dont know me rom from me ram :cop:

the movies are on seperate dvd discs ? try here