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Another question: Why on your userpage does it say "I can most of the episodes anytime by inserting a DVD into the DVD player, and selecting a particular episode to watch." as that doesn't make too much sense. Do you mean, "I can see most of the episodes anytime by inserting a DVD into the DVD player, and selecting a particular episode to watch."?
The Simpsons house has appeared on all episodes of The Simpsons and Simpsons Shorts, with the exception of several non-canon episodes. There are inconsistencies regarding the appearance of the house and how some of the rooms are laid out in the house throughout the series but the house has appeared in all canon episodes of the show.