Lets just say just for giggles sake you want to split a vid file so that your authoring software can handle the small chunks easier you will have to rename the file type @ the end of each split piece (e.g. from .001 to .wmv or whatever file format you are using) so your comp will recognize it I find that if you move the added split number into the file title from this example after the split (your_movie.wmv.001) to this (your_movie(001).wmv) it helps by making it easier to keep track of the chunks.