I'm trying to get some shorts onto one DVD using Nero Vision Express and it keeps breaking each film into a series of 30 second "titles". When I use the "Merge Titles" button, it puts them all together but there is a flash of black screen between each of the original 30 second blocks. I have each film on my hard drive as a Nero Show Time File (.vob) and they play fine off that. Driving me nuts, any ideas?