aingtea 
Sorry all, i'm very newbie on windows CE 6 development, i want to ask about bootloader. i've already build my custom OS using visual studio 2005 and success, the nk.bin is generated. the question is i want to install(download) the OS to the device(Mini 6410) using SD card, but i don't know how . maybe you have any tutorial or reference about how to deploy the OS to the device via SD card Thank You