The install on those parts is VERY straightforward. You can see your existing tranny & power steering cooler lines by looking just in front of your radiator (behind the bumper - look down through the plastic grill) at the bottom. They both attach with a small bracket to the bottom of the radiator mount. The hoses are connected with hose clamps around the side.

When you buy the "heavy duty" transmission cooler, it's the same metal hose, but has cooling fins around it.

If you're that worried about money, you could consider buying the parts and installing it yourself.