nested tiles:insert tags

Has anyone been able to nest tiles such that placeholders in the topmost frame can be populated by another tile 2 levels down? For example, I have a base.jsp tile (which is used by all my pages) which is responsible for color, global scripts etc.. I would like to set up a generic search.jsp tile

RE: [OT] File explorer (tree view component) ...

Well, forget about DHTML right off the bat. We went back to a customised jTree to address this requirement but I did give serious consideration to: http://scbr.com/docs/products/treetable/treetable.shtml and if you can handle it (v. impressive stats) http://www.bennet-tec.com/btproducts/tlist/tl