boy i haven't posted here in a looong time.

just got a dvd burner, and im trying to burn 2 mpgs to my first dvd using my bundled software "Roxio Easy CD Creator 5". i know im a newb the first part burns fine, it's about 800mb as an mpg1, so about 1/2 a 4.7gb dvd. the second parts burns fine as well, but after 40-60min. (acording to which dvd i tried burning) playing gets very skippy, pixels are huge, screen splits.. all sorts of nasty lookin stuff.

what gives?