You really just install an SVN server, for example svn serve:
http://tortoisesvn.net/docs/nightly/TortoiseSVN_en/tsvn-serversetup-svnserve.html

And a client, for example tortoise svn:
http://tortoisesvn.net/downloads.html

Set up a project on your server (create repository), and make the clients checkout the project. Then they can modify, remove, add files to that folder, and when they submit the folder, the changes are pushed to the server.

There's no specific involvement of devkitpro. I used svn server and client on one system for devkitpro, gamestudio and random other projects, just to keep track of changes and have a backup.