First, it's my gf's laptop, so may be this is my last post if you don't help me

. My stupid friend

dropped a burning matchstick on the keyboard after lighting his cig, melting the key around Caps Lock. Please tell me if i could replace the individual keys, or if the whole keyboard needs changing. Also, how much is it gonna cost me

. The laptop's model number is Compaq Presario M2000.