Nero cue files

Hi. i’ve been trying to record some karaoke discs. ive tested it, and it worked with only one cue file in nero. but now i wanted to record more than 1 track in the same disc. so i tried to burn several cue files at the same time, but it didnt allow. so i decided to use one single cue file that suposedly would include all the karaoke tracks but i got the error message: ‘‘an error ocurred while loading the cue sheet file,… (line8)’’ . is there any other program where you can select many cue files at the same time? thank you all.