if we can edit shared parks that would be neat, if all else fails a screenshot of your section would do..
there this too...
http://www.urbanramps.co.uk/creator/
if it's a real life spot, some pics would do or failing all else a drawing in photoshop
I don't mind volunteering to set up the parks...I've been doing 3D stuff for over 20 yrs now so am quite adept at translating things into 3D
so I suppose the next step is to get a list of contributors, each contributor will then need to state what kind of set up they want street/vert etc..and how many sections they want to add...