I have a ibook g3 500mhz dual usb with a cdrom drive. The sticker underneath the keyboard says ibook g3 500mhz, 128mb, cdrom. Does that mean the ibook has 128mb of ram soldered on the motherboard from factory? How well would this ibook with 640mb's of ram do with Ubuntu? And what is that button on the top between the f5 and f6 keys? It appears to have a hole in it? And why does the caps lock look to have a hole in it to? You may ask why i am asking these questions is because i just received this laptop in the mail and am waiting for a power supply to boot the thing up! Thanks!