Extract the 'measurement_playermodel.ent' file to 'gamepacks/urt.game/q3ut4' inside of your radiant install, resulting in 'gamepacks/urt.game/q3ut4/measurement_playermodel.ent'
Extract the contents of the 'editor' folder to 'q3ut4/models/editor/' within your urban terror mapping folder, resulting in "q3ut4/models/editor/sarah.md3", "q3ut4/models/editor/torso.tga" and so on

To use the standing playermodel in the editor, select the 'measure_playermodel_standing' from the entity menu

Updated 10 March 2024