Add ...
"C:\Program Files\Microsoft Visual Studio 8\SDK\v2.0\Bin\GacUtil.exe" /nologo /i "$(TargetPath)" /f
xcopy "$(TargetPath)" "C:\Program Files\Microsoft BizTalk Server 2006\Pipeline Components" /d /y
to the 'Post Build event command line' for the pipeline support component project in visual studio. This will automatically put the support dll in the GAC and BizTalk’s Pipeline component directory on building the solution/project.
Build the project.
Right Click on title bar and select Choose items. Click on the BizTalk Pipeline Components tab and select the new component from the list. If it is not available in the list Browse to the BizTalk pipeline component folder (C:\Program Files\Microsoft BizTalk Server 2006\Pipeline Components) and select the dll.