Couple things. First do you know how to get into the bios setup screens? Next download a program called SetFSB you can use that to increase fsb without going into bios. Next download a program called prime95 you will use this to check stability of your overclock.
First you will find the max overclock at stock settings using setfsb and prime. Install SetFSB, if I remember correctly the PLL you want to use is ICS9LPRS918BKL just scroll down high light it and check the Ultra box at top, then click getFSB. It will show you the fsb and mhz of current setup. You only want to raise fsb by 5 to start, then run prime for a hour. Stop prime and raise fsb by 5 again, and run prime for a hour. If and when you get a error or it reboots, drop fsb by 5 and run prime 2 hours. When you are done you will need to go into bios and set the fsb at what it is set in SatFSB program. Then reboot and run prime another 2 hours to be sure it is stable. Sound confusing yep. Just ask as you go along, plenty of help here.