You need to use dash launch to autoboot into fsd. A new more stable version has just been released called dashlaunch v2.01, you must be running freeboot 9199 in order for it to work. just found this looking at another forum and am going to try tonight if Iget the free time.
Taken from elite mod scene
easiest way to do this if you are already on freeboot is to download dash launch 2.01 and put that entire folder on your hard drive and run the default.xex file located in the installer folder. follow the onscreen prompts and you will be done. once done, you the console will autoboot into fsd or whatever other application you tell it to (xexmenu or the like). all you will have to do manually is set up the launch.ini which is very easy. also, you will be able to launch back into fsd or xexmenu from games just by pressing the center xbox button and the y button.