Here's the other thread where this is discussed, complete with pretty pictured and diagrams.
Linky to the other thread...

The short answer is: No, it doesn't work with the RockFos/SE hu's since they do not have the round 8-pin din connector. They have a more complicated (i think) 14 pin rectagular connector that seems to be more data-bus'ish and harder to decipher and work with. There might be some 3rd party (expensive) PAC devices that work with it - i think I've seen a few threads on that.