Microsoft SharePoint Designer Team Blog : Porting SharePoint Designer Workflows to Visual Studio

Microsoft SharePoint Designer Team Blog : Porting SharePoint Designer Workflows to Visual Studio: "When you have these files, rename the .rules file (if you have one) from *.xoml.rules to *.rules. Then add the .xoml and .rules files to your VS project. If you double click on the .xoml file in the Solution Explorer, the WF workflow designer should open, and you should see all your SPD actions in place. "