B20 ok'd in 07's?

[WMcGuire]

As I understand from reading recent articles that the 07 TD Rams are to be shipped with B5 in the tanks and Dodge has ok'd B20 in their heavy duty trucks with OEM secondary filtration, this may be the tipping point for biodiesel and the major fuel suppliers will have to start filling the demand, assuming this will happen soon, I'm wondering if the OEM secondary filtration could be added to any earlier HPCR engine without voiding the warranty? Oo.