I got a 512MB stick of ram for my 12" PB 867mhz. Its off brand, but when I installed it the RAM worked fine. Is there anything I should do to 'optomize' the RAM since it is not Apple brand? Repair premisions or anything like that? Any key combo to punch in when the system is starting up? Or should I just be happy I can run 10 apps at once w/o any trouble?!