My a/c won't change from regular vents to floor vents?

Basically, the blower is stuck on regular vents. I can change the temp, but that's about it. When I press the floor vent or defrost buttons, nothing changes. I have a 2006 4cy Honda Accord for the record. I'll take any help I can get.

Why my car does not stay on?

I have a 1997 Honda Accord LX 2.2l non VTec, the car starts fine but in an instant the car suddenly goes off, I have already replaced ignition control module, distributor seal and distributor cap. Before all that was replaced I took the car to auto zone for a check engine light diagnostic, it gave me speed sensor, MAP sensor and oxygen sensor.

Tires are cupped. Bad struts or bad alignment?

Brought my Honda Accord 6 months ago. Passenger side rear wheel had hit a curb(before I brought it) and blew the strut.

The cheap dealer only replaced the passenger side rear strut to "make things right". 6 months later(now) I'm looking at my tires and I'm noticing minor cupping on the inside edge of the DRIVER side rear wheel(side with original strut that wasn't replaced).

I read that it could possibly be alignment that is causing the cupping, or it could be the strut. How do I find out for sure if it's alignment and not strut/vise versa?

Tires are Yokohama Avid Envigors. Car has 45,000 miles. I don't notice any major toe/camber issues with the wheels.

How come my car (1996 honda accord lx) cranks but won't start but then later when I try again it starts up?

I try to start my car up and it just cranks and cranks but doesn't start up. I was at it for 30 minutes turning the car on and off and it was just cranking alot but not starting. I don't think its the battery because i jumped the car and tried starting it up and i got the same results (just alot of cranking), so i just give up but then an hour later when i come back and try to start it up it works! The car starts up. Does anyone know what could be the problem? Why does it do that at times? Its like it works at times and other times it doesn't. Oh and i noticed this problem has been occurring more when it gets cold out like during early mornings.

98 Honda Accord power door lock and windows not working. Out of ideas?

So I'll try to cover everything I've done to my car at this point. I had to replace the battery about 3 months ago. Power locks and windows were still fine. I installed a new touch screen stereo, wiring was a little tricky and I blew my headlights fuse but have got that replaced. After installing the stereo I installed a Viper Alarm system. Power locks and windows were still fine. Roughly 2 weeks after that, my car started acting up. It mainly had acceleration problems and would die when I stopped at a stop sign or a red light. I did some maintenance to include changing oil, coolant, and spark plugs and spark plug wires.

MAIN PROBLEM:
After changing the spark plugs, the power locks didn't work anymore. There's no click or any sound of that nature. Not only that, from the driver's side I couldn't control the power windows on the passenger's side of the vehicle anymore (front right and bottom right). My Viper alarm system also doesn't lock the vehicle though it still arms and disarms normally. I've checked all the fuses and they're all fine.

Come to find out, the acceleration problems was because of my map sensor so I got that taken care of but that didn't fix the power door lock and window situation.

I'm literally out of ideas.