The warren is a POI on Dantooine. Look in yout datapad (ctrl-D) under the POI tab.
Here is a guide
http://swg.stratics.com/content/gameplay/guides/guides.php?Cat=11&uid=532
and a list of guides for other things
http://swg.stratics.com/content/gameplay/guides/guides.php?Cat=11&uid=
Some are newer than others so things might have changed from when they were first posted. There are other guides out there as well so look for them.