hello everyone

i tried to compile linux kernel 2.6.31 on Fedora 12
the make , make modules and modules install ran successfully
but
problem with make install
while trying to create image it looks for mkinitrd command which is not available
i downloaded and installed the mkinitrd pckg and
make install was now successful
i got
kernel img and initrd img in /boot

also grub was updated properly
but i m not able to boot up the new kernel
the problem
the initrd seems to be and uknown type file and
the current kernel
has initramfs img with a .cpio extn


any solutions
plz help
thanx