I have a Phatbox made for Audi. I'd like to install this in my 2004 BMW X5. If I install the BMW firmware in my DMS and find a BMW Phatbox cable will the Audi Phatbox work in the BMW? Do you know any sources for finding a BMW Phatbox cable? I already have a BMW Blitzsafe and the DSP adapter. I have everything for thr BMW except the Phatbox unit itself.