Nick, there are tsc files, and some pairs of tsc and toc files. I have Rob Corn's AFS2 test version of his NZ Coromandel scenery, which is not generally available. The photo shows all the grass airfields and the excellent mesh lets you land "on the photo". Chris's files let me show these places in the Select Location screen, so I can choose a runway and a starting point. Very useful freeware, for now.