That is one of the most simple changes you can make to any song. Simply subsitute power chords for the major and Minor chords tlisted on the song lead sheet. A minor becomes an A power chord. A major becomes... you guessed it.... a power chord.

Since 5 chords ( another name for power chords) have no thirds there is no major or minors. Look at the song you want to play in power chords, change all the chords listed on the lead sheet to their equilevent power chords, and you are playing songs with power chords.