No dumb questions. Short answer: Not that I am aware of.
To be clear, the DRL disable does
disable DRLs, which are activated when (1) the sunlight sensor thinks it is daytime and (2) the Light Switch Module is in position 0. When DRLs are activated, the PWM duty cycle drops to around 60%. This will destroy all error eliminators (including KBOWE) VERY quickly, and most HIDs will refuse to run at all as the average voltage is around 8.5v. With the DRL disable software update, position 0 always shuts off the lights completely (PWM duty cycle = 0%).
With or without DRL disable software, during the day or night, there remains PWM regulation when the LSM is in position 2 (on). Therefore, the DRL disable does nothing except prevent accidentally placing the LSM in position 0, resulting in a destroyed BOWE and/or WMM (say, by a service shop).
What we have found is that this software update DOES NOT modify the "on" PWM duty cycle. We previously discovered that the PWM duty cycle and frequency is shared with all of the exterior halogen bulbs in the car - brake lights, running lights, turn signals, even reverse lights. It is mapped to battery voltage, to ensure that the current flowing through the bulbs is, on average, the same as if the battery voltage was equal to 13.0v. So at 14.4v (for example) the duty cycle will be about 80%.
As far as I know, there is no way to official Volvo software to change this. And if there was, due to the hardware
it would modify all bulbs, severely shortening their life as P1 run 'hot' voltage wise.
This has been discussed before. Yes, it is theoretically possible to load the factory Bi-Xenon software. However, this software expects a LIN signal from the GDL modules (which are not present in the halogen version, nor are the required wires) and analog signals from the chassis angle sensors (also missing wires). Without these signals, the CEM goes into fail-safe and shuts off power to the ballasts. All could be hacked together, but it is much cheaper and easier to put in the filter. A complete factory retrofit would involve a new chassis and engine harness, new headlamps and GDL modules, the angle sensors, and CEM software.