Add URL to Install new software (under Help)
Then chose the Core,Subclipse and JavaHL windows binaries.
You can then open an SVN perspective and add the trunk.
From there you can checkout the code into the eclipse directories.
Once they are checked out into eclipse… the eclipse becomes svn aware.
(you can test it by changing a file and it should be marked with asterisk)
The svn commands can be found by right clicking the file and they are located under Team submenu.
You can also do a project compare to the repository at the top level to quickly identify all changes in project.