I can't see why you can't but I can't seem to find any info on how you would do it..
One thing I've noticed on clio's os how poor the reception is - oem radios, newer radios, all sorts of aerials...
The work vans for example have fantastic radio reception and I've looked at it and theres nothing special about it at all - I even put my cd player in the van and it was really good...
So it must be the car at fault?