E65 installing CPT9000 from Siemens phone

Hi
I have a 2002 E66.
Ultimately, I'm trying to install Bluetooth. I can't get any info on whether this is possible with the phone I have installed.
The installed phone is a factory fitted one from BMW, and is this:
http://www.realoem.com/bmw/showparts...21&hg=84&fg=10

I don't know if this can be directly upgraded to BT, but have asked my dealership (here in UK) and Crevier, and neither knows if its possible.

Can I convert this phone to a CPT9000 setup, and then use the BT module for the CPT9000 TCU?

Any help appreciated.

Thanks