This tab is 100% full proof no matter what others may be this is the real way
h- hammer on

|------------------------------
|----------------------------
|--------------------------------
|------------------------------
|--------7---5---7--------5h7----
|--0--0--------------5h7--------




keep repeating this thorughout the song... to get a cooler effect slap the strings onto the guitar by pulling them away and then letting it go so it makes a "snap" sound or "slap" sound opposed to plain picking