1. Get the version into your workspace. Do this by selecting the project,
Replace With->Branch or Version..., select the version name, OK.
That's ok.
2. Select the project, Team->Branch.... Enter the name of the branch (e.g.
R2_0_FIXES).
No, that doesn't work. When doing as you say it insists that the version
name can't be empty. The exact error message is "Version name: Name must not
be empty". However, the version name input box is greyed out so I can't
enter a name - and this is where everything has stalled in the past.