actually, iDVD lets you burn 90 minutes...still not 120, though. how to avoid the time limit? don't use iDVD.
there is no real "time limit" for DVDSP. it's an authoring app. if your mpeg2 files were compressed at a low bit-rate, like 4 Mb/s, you can fit 2 hours on a DVD-R.
i'd search the forum.
tr