[OSM-newbies] routes as a layer

[list at sylva.icuklive.co.uk]

I'm still struggling with some of the terms, I'm wanting to put a map of 
an area (250 hectares) onto a website, I also have aerial photographs of 
the same area, but not yet georectified. Linked to these I want people 
to be able to see suggested walks, to avoid clutter I think the route of 
the walk should be a separate layer, i.e. visitors might select a route 
and then see it highlighted on the map.

Can anyone point me to how I might set about this, I've never got beyond 
basic html.

Andrew Heggie