スタンドアロンMODを使用するには貨物の設定が必要です。

You need to edit the cargo setting if you use standalone MODs. (Linked page is written in Japanese.)

MOD1
  Beverages Tandem Axle
  Stoughton Dryvan/Double 28ft
  Stoughton Drop Frame Van
  Stoughton Drop Frame Van Spread Axle
  Great Dane Dryvan 48ft

MOD2
  Great Dane Reefer 48ft
  Cheetah Gooseneck Container 40ft