Can i add a workflow as an activity to another workflow?

I would like to create composit开发者_如何学JAVAions of workflows in WF (3.5). Is it possible to directly use a workflow as an activity inside another workflow? I don't want to use the InvokeWorkFlowActivity, since it executes the workflow asynchronously.

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Take a look at this blog: CallWorkflowService

Taken in turn from this similar question: loading-workflow-activity-dynamically-from-xoml

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Late follow up: found out later that you can use workflows by dropping them in from your toolbox (Doh!)