Charles
Rewiring should not be a problem as others have stated.
As far as control, Lutron make a 3 circuit dimmer that you can control off of a simple $5 dimmer.
It is called a Hi Power dimming module. Here is the link for the PDF file [you need adobe acrobat reader to view] You would need the HP-4 version. It retails around for $850, but you should get it for less from a supplier that carries Lutron product. A good sales point is that it would give the customer one dimmer for the Whole fixture.
http://www.lutron.com/instructions/030452.pdf Hope this helps
Tom
