Use the Collection Manager to enable/disable which html help collections are available to your Visual Studio IDE (dynamic help etc).
For VS.NET 2003 use: ms-help://MS.VSCC.2003/VSCCCommon/cm/CollectionManager.htm
For VS2005 use: ms-help://MS.VSCC.v80/dv_vscccommon/local/CollectionManager.htm
For more info see the FAQ at the Helpware Group's web site.
HTH
Tim