oookk...after 2 hrs of agrivation finally got it. here's the story:
taking off the wiring harness-15 mins. there is absolutely no hand space where im working here.
taking off that other clamp. bout 30 mins. you gotta pull up on it and not push down. thnx xterra owner's guide. not! lol
taking the bulb out 2 secs.
new bulb in 45 min. i tried to push it in for about 10 mins, then i called a friend to come help and he couldnt get it in either. Stay with me people, no gutter minds. lol. so we started comparing the bulbs almost identical. one difference. the bulb i NEEDED was a 9004 and the bulb the autozone guy said i needed was a 9007. the 9007 is about 1cm too wide. go back to autozone go home and in no longer than 30 secs. light's in and clamp on, and harness connected. and i got lights. it was dark and rainin too. i also found a spare oil cap. must be from the previous owner cuzz i havent lost mine.
I'm in love.