??how

i have a pentium4, 2.47 ghz..with 1MB L2 CACHE and a HIS 845gvm-l mOTHERBOARD... 512 MB DDR RAM STICK... AND A GEFORCE MX 4000..128 MB 256 BITCORE..(which is a crap ) can i overclock my processor ??will it increase speed and performance..??how do i overclock it ?? also can i do anything...