change content in one Tile for one page only?

[MiB]

I need to change some content in my header tile for one page only,  
linking in some special javascript. Do I have to make a new main  
template just for this page, or is there some other way?

In several individual pages I need to change the id value of body,  
which is in my main template. How do I go about this in Tiles?

I've been trough the documentation, but this has eluded me. Please  
offer some starter points or thoughts.


/MiB