Welcome to the club!
http://forums.altimas.org/zeromain thats the link you should bookmark!
All the info here is in its proper section (for the most part)... (this has been discussed before in the suspension section)
The search button works too, and we are always here to help you out!
Anything up to $200 is a reasonable price for the install... and it isnt the most simple DIY, and can be dangerous! If you are going to attempt the DIY, I highly suggest finding a friend (here on nico, or one you already know) who has done this before!