Geoselect, Typeconvert, Slice 3D, Net 2.0

New versions of Geoselect, Typeconvert, Slice 3D extensions.
We adapt extensions to NET 2.0 and ArcGIS 9.2.
Now all extensions you can uses with ArcGIS 9.1 and ArcGIS 9.2.

Extension Slide Analyst integrity into Isoliner as free function.