how hard would it be to put in the new style nissan push button start with the factory nissan key fob from the newer model nissans? like the 07+ altima, 09+ maxima, etc. also if having a factory push button isnt possible, how about a aftermarket solution?

 

http://www.gallotech.com/

http://www.digitalguarddawg.com/2GOKEYLESS1.html

Check these out

 

i got a remote start with my viper security system if you want to go that route its a possibilty for you