ok, de_deathcookin is one of the more popular maps on the server, mostly because it works so well w/ wcs's abilities.
here are a few other rats style maps that look sweet
de_cyberwar_beta_2 - http://www.fpsbanana.com/maps/3857 this map takes[place on a motherboard
de_sunstroked - http://www.fpsbanana.com/maps/28584 by the same mapper as deathcookin, takes place in a garden outside
de_rats_crapperv1 - http://www.fpsbanana.com/maps/15811