[Building Sakai] Integration Sakai into Liferay - How to ??? - WSRP or else ???

[Phuc Bui]

Dear all,
I'm using Liferay to build a portal about education. So I would like to use
Sakai as LMS.
As I've  searched on the internet, I think WSRP is the best way, or at least
the easiest way to integrate Sakai into Liferay.
So, I'd like to ask you how to use Sakai WSRP Producer ??? What's the link
of WSRP Producer. (I'm testing on localhost)
By the way, tell me if you have solutions to integrate Sakai in to Liferay
as an application, a service. Somebody told me that I had to modify a lot of
codes of Liferay to satisfy that. So I'm considering two options: one option
is using WSRP, one option is modifying code (but I do not know how to yet )

Best Regards,
Phuc Bui