For Auto car get Apexi AFC NEO, this will sort your air fuel ratios, this guy on SAU sells them at a good price,
http://www.skylinesaustralia.com/forums/Ap...op-t155204.html
Ask him in PM to get a boost controller, that will sort your boost.
For manual car get aftermarket ecu like Apexi power fc, Greddy emanage, etc. These usually have the ability to control everything. Good luck, remember, google is your friend, shop around for prices then try support the sponsors on this site.