If you wish to use Boost.RangeEx then please use the version in the Vault. This has many additional features than the SVN sandbox version and a huge number of features over the current Boost.Range. Boost.RangeEx is backward compatible with Boost.Range so you might decide to use the trunk version if this is more convenient, but Boost.RangeEx adds Range Adaptors and Range Algorithms which are very compelling.
I shall post publicly once I have put a newer version into the main trunk.
Regards,
Neil Groves