No, rewritable means that you can burn DVD's. As far as I know all the dvd burners out there are dual format, meaning that they can burn +/- dvd blank media.
If you can only use +R format with your burner you may be able to booktype the +R to DVD-ROM. Heres a guide and a bit of info on the subject. http://forums.afterdawn.com/thread_view.cfm/1/277889#1577028#1577028