Take a look at the new features and tools you can use with ArcGIS Desktop 9.3.1.
To install the Geodatabase Toolset, you must have
The GDBT tab will be automatically added to ArcCatalog.
To add GDBT as a dockable window to ArcMap, follow these additional steps:
Extensions, checking the Geodatabase Toolset box, and clicking Close.
Toolbars or right-clicking in the toolbars region near the top of ArcMap.1 To check for the ESRI .NET Support Feature for ArcGIS, navigate to the location on your hard drive where you installed ArcGIS Desktop and look for the DotNet folder. For example, go to C:\Program Files\ArcGIS\DotNet. If you do not find the DotNet folder, follow the instructions below for installing the ESRI .NET Support Feature for ArcGIS.
To add the ESRI .NET Support Feature, you will need to access ArcGIS either on CD or via your network. Go to Start
Control Panel
Add/Remove Programs, select ArcGIS Desktop, and click Change.
When the message window appears, either insert the ArcGIS Desktop CD into your disk drive or browse to the source for ArcGIS Desktop on your network and click OK. When the ArcGIS Setup window appears, select Modify and click Next. Select .NET Support, click Next, and follow the instructions to install the ESRI .NET Support Feature for ArcGIS.