Here's a quick fix to enable/disable wireless using Fn+F2 on Slackware Linux on ASUS K52j and also the LED to indicate the status of the wireless.

First you need to create this file: /etc/acpi/events/etc/acpi/events/asus-wireless-switch

This file will contain the hotkey and the path to the script which is setting the wireless ON/OFF.

The /etc/acpi/events/etc/acpi/events/asus-wireless-switch content will be:

Then create another one: /etc/acpi/asus-wireless-switch.sh

With this script in it: