Danny,
importing and registering an Alpina in France really is a pain in the neck

However, your question still remains valid and my problem is not solved yet. Actual scenario is : After project completion, this car will first be registered in Germany, ''official'' owner will be a friend of mine. Reason for this ''German stay'' mainly is that I want car papers done at Alpina in Buchloe testifying the car is a genuine B2-S delivered at Alpina in 1972 etc... with complete description. This obviously can only be done in Germany. Once the car will have German papers, my friend will sell me the car. I will be the new ''official'' owner.
Next step (easy way) would be to import it to France and register it as a BMW 3.0 CSL with ''normal'' BMW 3.0 CSL papers (should not be that difficult, this I've already done). Other step (very hard way) would be to import it to France and register it as a BMW 3.0 CSL Alpina B2-S. This last way, I very honnestly think it will not be possible.
On the other hand, I would not have a big problem letting the car under my friend's name in Germany and drive it with German plates (I just will have to care about insurance and such kind of stuff). Future will tell.
How are your B6 pojects going on?
Sebring NL,
sure I will drive the car. As other cars in my modest collection, I do not drive them that much (500km - 1000km /year ?) but I drive them. To me, the real challenge is driving them very rarely but keeping them in the ''as new as possible'' condition. As I am anyway ill and definitely paranoid
(I do not drive them when it rains, I only drive them during summer time...), I am rather successful in my challenge