[pgarner]

ive never heard that 1 before and cant see any reason for it.
apart from the ecu (which saves itself roughly 20 seconds after the ignitions off ) most Modifications do not use power from the battery. if the ecus reset then you may lose setting such as a rewrite and it will reset itself to factoryy standard.

i know waynnes said about his audi felt different to drive and the windows didnt go up and down automatically. after the car was serviced take it the ecu was reset ( most rewites will not be erased i have been told, unless the ecu has a major problem )

any deep discharge to the battery causes damage to it. just means your going to hav to spend money on a new one

as youve been told to disconnect it and leave the lights on this aint going to do anything as the battery is disconnected when you connect it the lights will just come on.
as for having to drive the car hard, to i take it charge the battery, your altinater produces enough power at 2000 rpm to charge the battery. no need to wreak the engine. for that reason better yet if youve got one use a battery charger