Generally, the best module for the moment it is yogurt, which, however, has changed its license and distribution rules - look here at xoops.org site
XCL uses XSNS - Social Networking Service - read more here
(english).Important - It will not work on other xoops: XOOPS 2.0.x, 2.2.x, 2.3.x from xoops.org
It is worthwhile to look at the documentation that shows how the module can operate.Personally, I recommend Profile Module from myxoops.org site. It's still alpha, but it's currently the best module to manage profiles with multiple functions, which can be found on many social sites.
Module download: here
(german) and here
(english - google translated)