Newbie question on XM installation

[speciphi]

Ok...2nd question today:

Eventhough I have a 2003, the head unit is NOT satellite ready (sucks!). Production date is 03/03. I can't explain it.

Currently I have navigation, DSP, CD Changer, Ipod on the auxillary port (dealership installed it), and XMDirect receiver connected via FM Modulation ...which is horrible sound quality.

So...is there any way on earth to get my XMDirect receiver to work without FM modulation on a non-satellite ready nav unit w/DSP?

Note: I had the Blitz SLD-01 with CD pass thru on my previous 330Ci, but it does not seem to work in the X5. When I plug it up via the CD changer, the Nav system never reads it when I hit the "mode" button. I guess this is because the head unit is not satellite ready(?)

I've heard about the Pioneer P920XM as well, but I keep getting conflicting info. One site says it works with non-satellite ready radios, while others say the radio must be satellite ready. Does anyone know for sure?