In order to access the LDSTech Subversion repository, you must have an LDS Account. To obtain an LDS Account, you must know your membership number (if you are not LDS, you can still register for an LDS Account). Please follow the LDS Account link to get your account.
Subclipse is a plugin for the Eclipse IDE. If you are using Eclipse, it can be very helpful to install Subclipse, which enables you to do almost all your SVN operations from within Eclipse.
To install the plugin, see Installing the Subclipse Plugin for Subversion in Eclipse.