The link below is for several photos of a Z scale railroad (the Val Ease Central RR) built into 3 suitcases (valises) for travel and display. These photos were taken at the Eurospoor train show (Utrecht, Netherlands) last weekend and show some very fine modelling by the builder, Jeffrey MacHan (Montreal area, Canada).
http://www.platelayer.com/tour/eurospoor2003/index.htm
http://www.platelayer.com/tour/eurospoor2003/index.htm