I've added 18 slots, so now you can place objects in the window. Price, poly count, presets, and location are all the same as the original.
packaged version available here
Thanks to winchestergirl for the suggestion.
Special thanks to orangemittens for these great pics.
Thanks to Wes Howe, Inge Jones and PLJones, Ceixari, and Delphy for the tools. Sims3Packed in TSR Workshop.