Installation

I want to use grub to boot m0n0wall(so I can boot multiple soft routers on my USB storage), I have downloaded the m0n0wall CD-ROM ISO file, mount the file under linux OS and copy all files and dirs into /boot, add entry below in /boot/grub/grub.conf:

title m0n0
        root (hd0,12)
        kernel --type=freebsd (hd0,12)/kernel.gz

When it boots, the kernel can not mount correctly, how can I fix it?

another question is, I downloaded the file generic-pc-1.3b2sc.rar, it can be work on my USB storage, but I can not extract the file(I want to get file kernel.gz, mfsroot.gz etc.):

[root@BenjmS image]# ls
generic-pc-1.3b2sc
[root@BenjmS image]# file generic-pc-1.3b2sc
generic-pc-1.3b2sc: x86 boot sector, code offset 0x3c, reserved sectors 0, Media descriptor 0x0, reserved 0x16, dos < 4.0 BootSector (0x1f), BSD disklabel
[root@BenjmS image]#

How can I do that?