maxscript for denoiser settings

is it possible to change the vray denoiser RE radius and strength settings via maxscript?

Yes it is possible.

You can list all the accessible properties of the VRayDenoiser class with:show (VRayDenoiser())
And you can access your render elements using the render element manager like this:

(
    local rem = maxOps.GetCurRenderElementMgr()

    for i = 0 to (rem.numRenderElements() - 1) where isKindof (rem.getRenderElement i) VRayDenoiser do
    (
        local vde = rem.getRenderElement i
        vde.radius = 5
        vde.strength = 0.7
    )
)

Thanks Dan.