thanks guys...
i called the shop today for some advice...and he said that knock control regulation just basically means to replace the knock sensor...
my car has been running rough the last few days...it may be beause bad gas? im not sure...ill see if its still a bit rough after next refill...then i guess ill have to try and get it done myself...or get the shop to do it (yikes...600...damn my car is adding up now...)
it seems like a fairly major job...but i cant really afford 600