The mpegs on Archive.org probably aren't DVD ready. They will almost certainly require transcoding. It might be faster to DL the much smaller mpeg4 versions and transcode to mpeg2.
There are several relatively cheap DVD authoring programs that can make the sort of DVD you want. I use Nero 6 with NVE3 for simple things. DVD-LAB for more complex. I don't know of any free authoring programs.
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