this is not the optimus s forum this is the optimus slider/q forum anyways you'll need a custom recovery from here>http://forums.androidcentral.com/vi...how-root-custom-recovery-nandroid-backup.html and your rom then boot into custom recovery (power the phone off hold down the vol - and power at the same time) next (if you haven't already) transfer the custom rom to the sdcard of your phone and flash by selecting install zip>install zip from sdcard>and find where you put you custom rom then clear data/factory reset and advanced>clear dalvik cache