value link extendable?

Hi, I try to figure out how to organize my environments in pier. In one area of the site I need only to exchange one single component per navigation level. I'm looking for a way to only specify the environment on the top most node. The structure value link is one thing that might solve this problem. Is there a way to add something to the structure that the value link resolved? Then I could specify something like this +value:structure/neighbours+ to resolve a neighbours entry local to the seen page. This way I can have a more heavy weight environment on the top and would just specify neighbours entries on each page. Or is there another way to accomplish the same? thanks, Norbert