I need help !

Hi i have VPS , 512 ram , i already use cpanel/whm on it , case is im host only 3 site useing with wordpress , euch site havie 800 hit per day, but problem is geting err when im post on my site's (outof memory) one of my friend tel about LiteSpeed & he said LiteSpeed will stop this err as soon as possible:rolleyes: .

plz any one have Gide me how i install LiteSpeed on cpanel step by step ? im newbe for VPS:)

sorry for my poor English .