Adding 2nd Air Conditioner

[Glenn and Lorraine]

This is one of the most recent threads Carrier AC

Here is another talking about 2nd Air Conditioners

The above links should answer most of your questions.

As far as installation, if you are the least bit mechanically inclined with some electrical knowledge you shouldn't have a problem.

Now, even with all that, I am sure there will be plenty of replies to this post with even more good advise.