Welcome, looks nice man.
as admS15 said, google/searching is your bestie!!
you caught me in a generous mood with nothing better to do so I spent 1 minute and found the link for you.
http://www.sau.com.au/forums/topic/42895-howto-rb25det-high-boost-mode-with-standard-solenoid/
anything you need to know is probably already here, and if you do need to ask anything you will get a much better response if you put in some leg work before asking =)