If unetbootin is done there should be a directory called casper in the root of the partition you choose to extract the iso to.
I had unetbootin do it on a usb and then got a syslinux.cfg in the in the root as well.
This is the part that starts mint 8 in compatible mode (from there you can update the installer and install).
Code:
label xforcevesa
menu label Start Linux Mint (compatibility mode)
kernel /casper/vmlinuz
append file=/cdrom/preseed/mint.seed boot=casper xforcevesa initrd=/casper/initrd.lz ramdisk_size=1048576 root=/dev/ram rw noapic noapci nosplash irqpoll --
Now you can manually put that in your /boot/grub/grub.cfg (yes it will overwrite after an updategrub but it'll work if you reboot after changing). Please don't mess it up or there is a chance that you can't boot anymore because of the messed up menu. Since you cannot boot with CD or USB it will be hard to change the menu when the HD is unbootable. If you copy and paste this at the end you should be fine.
Code:
menuentry "Linux Mint extracted ISO" {
recordfail=1
set quiet=0
insmod ext2
set root=(hd0,7)
linux /casper/vmlinuz file=/cdrom/preseed/mint.seed boot=casper xforcevesa
initrd /casper/initrd.lz ramdisk_size=1048576 root=/dev/ram rw noapic noapci nosplash irqpoll --
}
The line insmod ext2 assumes you have your casper directory on a ext2 partition.
set root=(hd0,7) Means you have the casper directory on the 7th partition of the first HD.
I am not sure if the "ramdisk_size=1048576 root=/dev/ram rw noapic noapci nosplash irqpoll -- " has to come at the end of the linux line or at the end of the "initrd /casper/initrd.lz", I put it at the end of the initrd line but if it doesn't start mint then move that part to the end of the linux line like so:
Code:
linux /casper/vmlinuz file=/cdrom/preseed/mint.seed boot=casper xforcevesa ramdisk_size=1048576 root=/dev/ram rw noapic noapci nosplash irqpoll --
initrd /casper/initrd.lz
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frugall install from unetbootin problem
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