i dont think the 99 should be much different, but the 2001 civics and my 2001 accords are easy to do. All you do it take your headlight out, heat up the sides, pry it open, take the strip out, and seal it back together with some silicon.
In some states its illegal to not have an orange turn signal. I live in CA and ive had my lights cleared (which on an accord isnt the turn signal, but i have the turn signal white too) for about a year and i havent been pulled over and none of my friends have either. Its not one of those things cops go looking for, and most cops dont even know its illegal unless u use like red or purple turn signals.
hope that helped u somehow.....
