Toggle VFB sRGB-button from mel?

[dandruff]

I need to be able to activate/deactivate the sRGB-button in V-Ray Framebuffer, on rendertime, from a script.
I've boiled it down to find that the setting is in the vraySettings.vfbSA attribute, but it's in the middle
of a series of int's and isn't very clear in what it is doing? (17473/17409?) Is there a simpler way to access and
change this setting somehow?

//:d

[vlado]

Unfortunately there is no other easy way to set this right now for an existing scene. However you can set the default value of the button for new scenes using the VRAY_VFB_SRGB environment variable.

Best regards,
Vlado