>>>>The necropolis of the Via Triumphalis (Santa Rosa) and dell'Autoparco are temporarily closed for renovations in progress.
Is this different from the Scavi tour everyone is referring to above? If not, how do I book this?<<<

That is a different scavi tour/area. That scavi (scavi = excavations) area was one where they were attempting to build an underground parking area and discovered some ruins. You can read about it here.
http://mv.vatican.va/6_DE/pages/z-In...006_10_12.html

Walter aka ParadiseLost posts about both on this thread and includes a link to some pictures.
http://www.fodors.com/community/euro...es-history.cfm

In the above link is also a link for a thread on the Via Triumphalis.
http://www.fodors.com/community/euro...riumphalis.cfm

nnancy, glad to help and glad you were able to book it! I really enjoyed my experience.

kybourbon, that other tour sounds interesting as well - I'll have to make a mental note for whenever I get back! Thanks for the links.

Did you see this thread about reserving tickets for sites in Italy?
http://www.fodors.com/community/euro...s-in-italy.cfm