Ok i explain my problem ok i need to create a dvd boot like a Win98 bootdisk when the dvd load and i got a menu dos like cdshell maybe. for many options like below. Dos prompt Format Local Disk. Install some software Run Norton commander Run RAR DOS or other powerfull dos utilities or backups tools. and other like maybe start install Windows Xp.. i have 2 type of dvd now dual layer 8.4 go and normal dvd. but i wanna know How to make it? its by cdshell? like this thread? http://severinterrier.free.fr/Forum/viewtopic.php?t=234 i hope someone can help me thanks. ah and my last question its possible to creat a bootdisk or drive in dos with a SDcard and a sd-drive?. thanks