man first of all when u make wallpaper u must be careful cuz, u must make the wallpaper 16bit and then after u make the bootscreen u must make it in format .EX_ open run and then write in cmd and press enter, after u make it locate ur ntoskrnl.exe (bootscreen), so if u bootscreen is in D:\Setup then write cd "D:\Setup and press enter, after u make this then write makecab ntoskrnl.exe and the job is done, i hope i was clear