Very easy as you got a DV Avi, your lines should be like this:
Code:
Avisource("C:\ThePath\To\Yourdvsource.avi")
Smoothdeinterlace(doublerate=true,blend=false).Selectodd()
convert60ito24p(2,0)
Befor running this
"Smoothdeinterlace.dll" and the 60ito24p funktion (function copied to an empty textdocument and safe into the Avisynth PluginsFolder using the .avsi suffix) ... should be both in the Avisynth 2.5 Plugins Folder!
By this you don't need the Import- and LoadPlugin-Lines like you quoted above.