Basically, watch the updates as they go and exit to the game (load GT6) after 1.07 is installed. In the game 1.07 will do its second step to the update. When 1.07 step 2 is done, exit and do the 1.08 update, once 1.08 is installed again exit to the game (load GT6) it will do the second step, once done move to 1.09.