Hello itWorks itWorks,
Yes, you can use the latest TCEK version with the Q1 2009 release of RadControls for WinForms.
You will have to just replace the references from the old Telerik assemblies to the new ones.
However, as you know the release process here at Telerik is at stages. And the TCEK package is prepared at the last stage because it depends on the RadControls for WinForms assemblies. This will happen this week. And I am happy to let you know that besides using the latest Q1 2009 assemblies, we will be adding support for Visual Studio 2008 (yes, this week).
the Telerik team