i was looking at a guide here about how to add permament subtitles to movies using DVD2SVCD. i was installing vobsub and it says that it needs the text sub for avisynth or something so while i was trying to install it, i got an error message. in his guide is said "If you get any errors under the installation you have to power op you computer in fail save mode and install it from there" what does he mean about fail save mode?