its really easy if ur jsut doing indiglo gauges. the only thing i am going to warn you about, is when taking off the bezel, there are the 2 connector harnesses in the back, they will be a bitch to take off. I got pissed and used a screwdriver to pry them off
just be casreful and dont get angry like i did.
Now to power the gauges here is the simplist and most effective way to do it. You are goign to need a "mini fuse tap" only place i coudl find them was discount autoparts. The thing is you need ones that has 2 fuses on it. search the past forms and you will find a pic of the "fuse tap"
Now take this fuse tap and put it in the fuse in the passengerside for the tailights. This way whenever they come on (when ur parkignligths or reg lights come on) your gauges will come on auto. For a good grounding spot there is a metal plate behind the driverside footwell. just attach it to one of the bolts on that thing
If you ahve mroe quesitons let me know and i am more then glad to help