duplicating...?

I have a 3D mesh that needs to be duplicated and randomly placed everywhere. Like this:

For i = 1 To 20
	sphere = CreateSphere()	
	PositionEntity sphere,Rand(-20,20),Rand(-20,20),Rand(-20,20)
Next

My only problem is I want to do that without having to load the model I made every time. Is there a way to avoid doing this:

For i = 1 To 20
	model = LoadMesh("model.3ds")	
	PositionEntity model,Rand(-20,20),Rand(-20,20),Rand(-20,20)
Next

Sorry if I didn't explain it very well.
-Thanks

For i = 1 To 20
if i=1 model = LoadMesh("model.3ds") Else model=copyentity(model)
PositionEntity model,Rand(-20,20),Rand(-20,20),Rand(-20,20)
Next

Oh, didn't know there was a CopyEntity command.
Thanks.