This is what maptools says I am missing:
Sceneryobjects\UKDT\Cotterell\Fellowsfilm Road Ware\Roadworks\Cone 1.sco
Sceneryobjects\UKDT\Cotterell\Fellowsfilm Road Ware\Roadworks\Cone Lamp.sco
Sceneryobjects\UKDT\Cotterell\Road-hog123\Addon_British-Style_Road_Signs\Generic\Bus Rail and Cycle\P953_only_Bus+Cycle.sco
Sceneryobjects\UKDT\Cotterell\Road-hog123\Addon_British-Style_Road_Signs\Generic\Bus Rail and Cycle\P962-2_lane_Bus+Cycle_Both.sco
Sceneryobjects\UKDT\Cotterell\Road-hog123\Addon_British-Style_Road_Signs\Generic\Informatory\P2402_Welcome_To_Town.sco
Sceneryobjects\UKDT\Cotterell\Road-hog123\Addon_British-Style_Road_Signs\Generic\Poles\2,0m_Pole.sco
Sceneryobjects\UKDT\Cotterell\Road-hog123\Addon_British-Style_Road_Signs\Generic\Poles\3,0m_DualPole.sco
Sceneryobjects\UKDT\Cotterell\Road-hog123\Addon_British-Style_Road_Signs\Generic\Poles\3,0m_Pole.sco
Sceneryobjects\UKDT\Cotterell\Road-hog123\Addon_British-Style_Road_Signs\Generic\Temporary\Keep_Left.sco
Sceneryobjects\UKDT\Cotterell\Road-hog123\Addon_British-Style_Road_Signs\Generic\Temporary\Keep_Right.sco
Sceneryobjects\UKDT\Cotterell\Road-hog123\Addon_British-Style_Road_Signs\Generic\Temporary\TrafficCylinder.sco
I've got Cotterell 1.0a installed, but that map is not working either. Got no scenery appearing on it at all just sky.