I have just tried to run the toolbox utility:

Infragistics2.ToolboxUtility /v 8.1

It said:

Begin processing NetAdvantage version 8.1

VS: 8.0
Removing Tabs...
Removing tabs...COMPLETE

It then gave the following error:

An error occurred while attempting to add the Infragistics components to the tool box.

and generated the following log file:

01:05:36 - Params: /v 8.1
01:05:36 - PUBLIC: Begin processing NetAdvantage version 8.1
01:05:36 - Beginning to process VS v7
01:05:36 - Getting Type for ProgID: VisualStudio.DTE.7
01:05:36 - Type for ProgID: VisualStudio.DTE.7 - null
01:05:36 - Beginning to process VS v7.1
01:05:36 - Getting Type for ProgID: VisualStudio.DTE.7.1
01:05:36 - Type for ProgID: VisualStudio.DTE.7.1 - null
01:05:36 - Beginning to process VS v8.0
01:05:36 - Getting Type for ProgID: VisualStudio.DTE.8.0
01:05:36 - Creating type: System.__ComObject
01:05:42 - PUBLIC:
VS: 8.0
01:05:42 - Getting Toolbox Window
01:05:42 - Getting Toolbox
01:05:42 - Getting Toolbox Tabs
01:05:42 - Getting Install Directory.(netAdvantageVersion: 8.1, target: 8.0, type: 0, CLR: CLR2x)
01:05:42 - Attempting to get NetAdvantageJP key 1
01:05:42 - NetAdvantageJP key is null
01:05:42 - minimumVersion: 6.2
01:05:42 - Getting VersionKey: found
01:05:42 - Getting Install Directory Inner. (versionKey: HKEY_CLASSES_ROOT\Infragistics\NetAdvantage\Net\Full, target: 8.0, type: 0, netAdvantageVersion:8.1, CLR:CLR2x)
01:05:42 - Getting WEB key
01:05:42 - Found WEB key
01:05:42 - Getting CLR2x key
01:05:42 - Found CLR2x key
01:05:42 - Processing installed version: Version8.1
01:05:42 - Version Not installed: Version8.1
01:05:42 - GetInstallDirectory Inner returns: ''
01:05:42 - Install directory not found.
01:05:42 - GetInstallDirectory returns: ''
01:05:42 - Getting Install Directory.(netAdvantageVersion: 8.1, target: 8.0, type: 1, CLR: CLR2x)
01:05:42 - Attempting to get NetAdvantageJP key 1
01:05:42 - NetAdvantageJP key is null
01:05:42 - minimumVersion: 6.2
01:05:42 - Getting VersionKey: found
01:05:42 - Getting Install Directory Inner. (versionKey: HKEY_CLASSES_ROOT\Infragistics\NetAdvantage\Net\Full, target: 8.0, type: 1, netAdvantageVersion:8.1, CLR:CLR2x)
01:05:42 - Getting WIN key
01:05:42 - Found WIN key
01:05:42 - Getting CLR2x key
01:05:42 - Found CLR2x key
01:05:42 - Processing installed version: Version8.1
01:05:42 - Got reg key for installed version: Version8.1
01:05:42 - Getting InstallDirectory from registry for version: 8.1
01:05:42 - GetInstallDirectory Inner returns: 'C:\Program Files\Infragistics\NetAdvantage for .NET 2008 Vol. 1 CLR 2.0\'
01:05:42 - Install directory: 'C:\Program Files\Infragistics\NetAdvantage for .NET 2008 Vol. 1 CLR 2.0\' found.
01:05:42 - GetInstallDirectory returns: 'C:\Program Files\Infragistics\NetAdvantage for .NET 2008 Vol. 1 CLR 2.0\'
01:05:42 - PUBLIC: Removing Tabs...
01:05:42 - PUBLIC: Removing tabs...COMPLETE
01:05:42 - winPath: C:\Program Files\Infragistics\NetAdvantage for .NET 2008 Vol. 1 CLR 2.0\Windows Forms\Bin
01:05:42 - webPath:
01:05:42 - Register MessageFilter
01:05:42 - Getting temp file name
01:05:42 - Got temp file: 'tmp5803'
01:05:42 - Got full temp file: 'C:\Users\davidb\AppData\Local\Temp\tmp5803'
01:05:42 - Getting Solution
01:05:42 - Getting template project
01:05:43 - EXCEPTION: System.IO.FileNotFoundException
 Source:
 Message: The language specified is not supported by any of the installed packages.
 Stack Trace:    at EnvDTE80.Solution2.GetProjectTemplate(String TemplateName, String Language)
   at TBUtility.ToolboxUtilityManager.AddTabs(DTE _dte, String target, Window _tbWindow, ToolBoxTabs _tbTabs, String webInstallDir, String winInstallDir, String winTabName, String webTabName)
   at TBUtility.ToolboxUtilityManager.ProcessArguments()
01:05:43 - dte.Quit
 

Nothing was added to the toolbox. Is there anything I'm doing wrong?