Simply edit the "Point=" line, for example to "Point=93156" Your value might be different but simply add a few numbers, then load to check if you bypassed it. This works for any xClannad game, and I read it from some Chinese site whose name I've long since forgotten. I've still a few of my xClannad saves, though LB:EX is quite buggy, for one thing, I couldn't seem to get a good end in Mio's route, even following a walkthrough, so I suspect some bugs in the background, but I haven't tried the other routes, though they might not work properly either.
Thanks, I didn't find a point 93149, however I added numbers to every point and it didn't work. Any ideas?