The package contains a portlet component for the project view page that contains an iframe with a configurable URL that may include the project's path and the path of the project's customer. This way you can build a "link" into your sharepoint site.
The page also contains a variant of this component suitable as a workflow "panel" for the workfow. This way, you can implement file uploads to the Sharepoint site as part of a ]po[ workflow.
(A screenshot of a sample iframe in a project page)
im_sharepoint_project_component Returns a HTML component to show an iFrame pointing to a Sharepoint site