Step 8 is about downloading the process template from your TFS server since it carries the reports. Using the Process template manager, say you downloaded the Agile process template to a directory "C:\TFS", you'd find a new folder there called "MSF for Agile .."
In Step 11, you'd use the path to this directory, so your command would be
TFSUploadReports /s <yourtfsservername> /p <yourprojectname> /t "C:\TFS\MSF for Agile..."
Let me know how it goes.