How is it that you "booktype?" I'm certain my burner is compatible with DVD+R, it's just I have always used DVD-R without much thought to it.
you can only booktype the +R media! And only if your drive allows booktyping! here read all about it: http://www.booktypefaq.com/ and another good read is this: http://www.cdfreaks.com/reviews/Why-DVDRW-is-superior-to-DVD-RW/
some drives like Plextor(Plextor Tools), BenQ (Q Suite)ect.. have there own software you can set booktype to DVD-ROM, you can also use dvd decrypter or DVD Info Pro to do it as long as your drive supports it