Hi, I have a 92 RS and I just got some new AC vents for it but I have no idea of how to put them in. Can somebody help?

 

Look at the sides of the vents. You'll see little tabs right at the point that it swivels. Carefully pry this tab towards the center of the vent and pull the vent out. It's easiest to pull one side out a little, then do the other side. The new ones should just snap in. If you got new vents to eliminate floppy vents, there's another solution. Get some self adhesive felt, cut a strip as wide as the vent by about 1/4", and stick it in there. The pressure of the felt on the vent will keep them from flopping around, and since it's black you won't see it either.