Eng Halim 
hello , i`ve mini6410 and i made cross compile for busybox and got _install directory and i made with it mini rootfs now i need to replace it with my own rootfs on the kit i put it on sd card as root.img and try to make install ,it give me error that the rootfs must be yaffs so i got mkyaffs2image-128M and i want to know how to use it to create yaffs rootfs sorry for my bad english :)