Whew! Squeezing 4 hours onto a single surface disk and keeping quality is a very tough job. About the best you can use to do it is TMPGenc with a quarter D1 setting. And even then you'll still lose resolution. Using the low resolution setting and MP2 audio, you can get 270 minutes onto a single surface DVD-R. But many DVD authoring programs will not like this and try to 'fix' the video, messing up everything.

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Fav quote - "Experience is whatcha don't get 'till ya don't need it no more."

System - Athlon 1.4GHz, Win98, Hauppauge PVR250 receiver and compressor.
Software -Magix Movie Edit Pro 10, Nero 6 + NeroVision Express, Moho 4.61, PSP 8.1, Bryce, Quicktime 6.52 pro, Goldwave 5, DVD-Lab.
Cameras - Panasonic GS9, Canon ES8400V, Canon EOS D20 and Canon A70