The following line has been added to config.txt:
19) If 1, Speeder will automatically use your weapon's burst skill when it is fully charged.
Speeder will not use the skill unless you are in combat and the game is the active window.
The skill will be activated with an ALT+1, ALT+2, or ALT+3 keypress depending on which burst skill is active.
This addition requires updating Speeder.