find out which VOB files are the trailer...decrypt them to your hard drive. open up ifoedit..choose to create a new ifo. it will then create an ifo for your vob file. one minor note if you want to play the trailers in order rename them in this sequence VTS_01_1, VTS_01_2 etc., and then create the new ifo file. Then once your ifo's and vobs are in place you need to open up ifoedit again and click GET VTS SECTORS. a prompt will ask if you want to save the changes select yes. after you are done with that create a folder called VIDEO_TS and place the ifo and vob files in it. Then go into nero, select to create a DVD Video file and import all your files in that folder to the VIDEO_TS folder in Nero. Once that is complete, do not burn it to the dvd-r, create an image of the dvd video, after you have create the image (5-10 minutes) go back into nero and choose file, burn image, then select the image you created. you should then have a working dvd of your favorite trailers!