HELP... Headlight bulbs

ok guys... im new to this forum and new to the buggy world... i used to post on maxima.org but my v6 days are over. so sorry if this has been posted already. how do i change the headlight bulbs??? i bought some piaa H1 4000k headlight bulbs and have not been able to install them. Is there a how to on this subject already posted? if not can anybody tell how to if they have already done it. thanks.