Thanks Denise.
I am using ArcGIS Mobile 10 and mobile project center. I have made the layer un-editable, however it can still be selected. The issue is really with zooming in the mobile map. If I try to select a sewer line which runs through a parcel, the program will select both the sewer line and the parcel and automatically zoom out. I'm just trying to simplify the operation for field workers so it is as simple as possible. They have no need for selecting a parcel, but it appears that I cannot make that happen currently.
It would be helpful for those of us using desktop software if we could make a layer unselectable, creating somewhat of a "basemap" layer.
Sean