How do museums present and preserve installation art?

From "Learn Online" section, on London Tate Gallery website, this interesting "e-learning mini-website" enlightens us about production, presentation and conservation of one of contemporary art main medium: installation art.
Focusing on Bruce Nauman's work MAPPING THE STUDIO II with color shift, flip, flop, & flip/flop (Fat Chance John Cage) (2001) this mini-website explores the work and some of the ideas behind it by means of interviews with the artist and the gallery curators, showing also original video footage from the work. It then gives a deeper look to technology involved in this work creation and presentation, introducing the issues related to installation art preservation, eventually examining some more general issues regarding installation art museum ownership and some responsibilities in relation to its management and care.
Further notes and links to other useful sites and texts are provided.