Combining video and data files on DVD

We had someone create a DVD for us which when put in a DVD player it plays the video. When the DVD is put in the computer a separate menu comes up for access to data files. Video and data on the same DVD. When viewing the DVD via windows explorer I see the the AUDIO_TS and VIDEO_TS folders plus all the data file folders. We would like to copy the existing DVD we have with both video and data files and also be able to create new ones. I tried copying the existing one using Roxio 7 but was unsucessful. We haven’t been able to figure out how to do either. HELP!!!

could you please not crosspost, I don’t like people that break our rules…don’t make me not like you and check our rules too.