Gordon,
I installed the Nokia hands free kit in my 97' M3. I put quite a bit of thought and time into everything about the system... Hence I didn't have to drill a single hole or cut anything on the car. IMO, the install turned out absolutely flawless. Especially after seeing a few of the so called "professional" installs in cars here at work.
Wish I had pictures. Gotta get a digital camera...
I purchased the M3 cradle mount from pana-vise and have been VERY pleased with it. If memory serves, the mount for the ram is located on the right side of the radio. Fits between the right side of the radio and the dash.
If you don't like this mount, most installers use a universal post mount. Mounted to the floor or something. I don't particularly care for this arrangement, but to each his own.
One piece of advice I will give you straight off, is to get a Genuine Nokia kit rather than one of those "me too" kits.
A friend of mine got a "me too" (generic) kit and you can definitely tell a difference in quality in how its made and its performance.
Even though it looks very similiar. Point being, its not worth the little bit of money you can save.
As far as the Ram install, I've only begun to investigate. What I have determined is to mount the speaker directly underneath the middle seat, facing forward. This provides for a "stealth" installation of the speaker, while providing equal, yet powerful voice levels.
As far as the Micophone, I think they recommend mounting to be approximately 36"-48" from the speaker, to avoid excessive feedback. Since the microphone is somewhat directional, it will cut down quite a bit of feedback from the speaker.
As I said, I don't have one installed in my Ram, so I cannot comment on its performance. I would die without it in the M3.
Aside from the hands free part... . The external antenna has proven invaluable in keeping calls when entering "dark" cell areas.
Another accessory I would recommend is the privacy handset. It allows you to take advantage of the battery charger and external antenna... While you talk on a full size volume controlled privacy handset.
These things alone, makes it worth the money. IMO.
If you have any additional questions, please feel free to e-mail me directly.
Picture of panavise Cell mount in 2001 Ram