For further information on LMP files look in the ``Unofficial LMP format description''. The current version is http://www.planetquake.com/demospecs/lmp.
For a huge collection of some great LMP files, look at the COMPET-N home page http://www.hszk.bme.hu/~ha211/compet-n/.
For further information on DMO files look in the ``Unofficial DMO format description''. The current version is http://www.planetquake.com/demospecs/dmo.
For a small collection of DMO files, look at the http://www.acs.oakland.edu/~klmatero/duke3d/demos.html.
For further information on DEM files look in the ``Unofficial DEM format description''. The current version is http://www.planetquake.com/demospecs/dem.
All info you'll ever need on DEM files can be found in the published Quake source at ftp://ftp.idsoftware.com/idstuff/source/q1source.zip
A simple DEM file editing guide can be found at http://www.Z-Studios.com/archives/filmat11.html.
For further information on QWD files look in the ``Unofficial QWD format description''. The current version is http://www.planetquake.com/demospecs/qwd.
All info you'll ever need on QWD files can be found in the published QuakeWorld source at ftp://ftp.idsoftware.com/idstuff/source/q1source.zip
For further information on DM2 files look in the ``Unofficial DM2 format description''. The current version is http://www.planetquake.com/demospecs/dm2.
DM2 file editing tutorials can be found at http://www.Z-Studios.com/tutorials/dm2/tut_demo.html.
For further information on Quake II Relay project look at http://www.planetquake.com/relay/.