Ulead dvd factory

Hi guys Im having a little trouble burning a converted file.

I used tmpg to convert to 700 mb bin files into 1 dvd pal file and i set tmpg to encode it for a dvd 4.7 gb size. So taht part was all good. Then I go to dvd movie factory to make the dvd and when I load the fille it is a 8gb size. So i have to make to dvds for it to come out. I remember doing this a couple of times and it worked fine before. Is there anything I can to bring the files together on one dvd? maybee I can take the vob files and compress them somehow?

PLease help out. THanks