Clipping the brown wire at the DRL module and shorting it to ground will not fry anything. It would normally be shorted to ground by the parking brake switch when parking brake was engaged anyway. You would only be fooling the module into "thinking" that the brake was on and DRL would be shut off. Your DRL's do not operate anytime the parking brake lever is pulled yes??
Just make sure that you short the wire from the module and not from the harness or brake warning light will not shut off.
Diagram below of DRL location and a diagram of the wiring for the system. Note pin 1B to the parking brake switch.