Nero 8 Ultra - DVD+R DL Format - Drive Image

Hello All,
Hope im posting in the right place!

I am using NERO 8 Ultra and i need to format a DVD+R Dual layer dvd so that my back up software - Drive Image can write to it.
According to tech support at drive image, i should use a dvd + media and then format it so that it can be written to using udf.
Unfortunately ive tried quite hard to get nero to format this but theres just no option.
Any help wil be appreciated.
Many thanks
Sal