Right click on your static mesh and "convert to -> static mesh" and when the window appears you should name the package myLevel (UEd only accepts this version of the name AFAIK) then you can set a group for it, e.g. "movers" and the static mesh name.
NOTE: You have to replace all static meshes manually! You can make "select matching static mesh" to select all static meshes which look the same and then you can open the properties window and easily change the static mesh under Display->StaticMesh
Probably you have to change the textures of your static mesh as well!
To do that you can open the SMB and change the materials in the bar below the SM viewport.
BTW don't forget to set karma collision for your static meshs! They will lose the collision properties when you myLevel them!!
NOTE: You have to replace all static meshes manually! You can make "select matching static mesh" to select all static meshes which look the same and then you can open the properties window and easily change the static mesh under Display->StaticMesh
Probably you have to change the textures of your static mesh as well!
To do that you can open the SMB and change the materials in the bar below the SM viewport.
BTW don't forget to set karma collision for your static meshs! They will lose the collision properties when you myLevel them!!
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