About 10 years ago, I guess, the place was renovated, I believe funded by students of the school itself. There was a display about the school, which unfortunately I didn't take photos of.
On my return in 2011 I was disappointed to find the gates closed, and the guard off duty somewhere. I managed to raise someone to let me in, but all I found was offices of Zambia National Heritage. I asked if I there was anything I could see, but there wasn't. Could I see the school register? Unfortunately not. It was away somewhere, but not on display. Maybe eventually it will be.
There are two museums in Lusaka I know of - the main one (which mostly houses items relating to the independence struggle, but was pretty sparse when I visited it, admittedly some years ago); and Kenneth Kaunda's house. Surely they could have a display in the main museum about the school? About the early properties? About the design of the city? About the history of the various suburbs and how they got their names? About the early inhabitants? About the items held by the national archives?
The new president, Michael Sata, has said that he is going to make tourism a priority. Let us hope that this will mean some progress.
Here's what it looks like now: tidy and in good physical condition, well restored, but really operating for the benefit of national heritage, and not advertised as a place for interested people to visit, or offering anything to see beyond the exterior, if you can get in the gates at all. A shame really for one of the oldest buildings in Lusaka....
So this was Lusakaas, Richard Sampson, 2nd edition, 1982
Showtime, Dick Hobson, 1979
Adventures beyond the Zambesi, Mrs F. Maturin (as quoted by Sampson; I don't have this one)
The Peugeot Guide to Lusaka, Geoffrey Williams, Zambia Geographical Society, 1983