You do. Also make certain that the particular GF knows the ability of Boost. I noticed the same thing on the PS-X only to realize they don't towards the beginning of the game. If they do and you are holding select, try upping offscreen drawing maybe?
I don't look for help from manual. If I've played the game thru million times (5 or so) the problem MUST be in the emu, not in my memory :innocent: Never even thought of cheking from the manual... :eyemove: