How can I shade specific lots in a city or export these features to a new shapefile?

__6

I need to shade various lots to show what district they are in. I initially tried selecting the districts to export them into a new shapefile (at which point applying the proper shading shouldn't be an issue) but because when I added the file I got this old error:
"the following data sources you added are missing spatial reference infomration. This data can be drawn in ArcMap but cannot be projected"
I can not export it. I tried going to properties but it would let me specify a coordinate system.

Any idea what I can do to solve this?

I'm in 9.3 by the way.

CoryMacNeil1

Hi,
It sounds like your data does not have a projection defined.  To do that you need to use the Define Projection tool in ArcToolbox.

Also, instead of exporting the selected data into a new shapefile why not create a layer from the selected data.  It is just another layer in your MXD pointing to the same source data but with a definition query.  You can symbolize it differently and even perform geoprocessing on that data.  All you have to do is right-click on your layer with a selection in the Table of Contents --> Choose Selection --> Create Layer from Selected Features.

I hope this helps.
Cory