can anybody help w/ how to install them?

Why would u buy them there overraded :-/ U gotta take out the dash and whatnot :) good luck

Never done it or plan to do it, but came across a how to page with installing reverse indiglo gauges on a prelude. Maybe it'll help? Good Luck!
http://www.24kracing.com/how_to/how_to.htm
and on an Accord
http://www.autotoys.com/New_Tech/DIY_2000/Indiglo_Accord_Kit/indiglo_accord_kit.htm