[tvjon]

I usually do this using just RPi itself, since the kodi image is relatively small so it's a quick operation. You just need a SD card reader. Here's one I prepared earlier today

/dev/sdb is the target micro SD card, seen here.

pi@137 ~ $ df -h
Filesystem Size Used Avail Use% Mounted on
rootfs 5.8G 5.3G 212M 97% /
/dev/root 5.8G 5.3G 212M 97% /
devtmpfs 215M 0 215M 0% /dev
tmpfs 44M 308K 44M 1% /run
tmpfs 5.0M 0 5.0M 0% /run/lock
tmpfs 88M 0 88M 0% /run/shm
/dev/mmcblk0p5 60M 13M 47M 21% /boot
/dev/mmcblk0p3 27M 423K 25M 2% /media/SETTINGS
/dev/sda2 698G 461G 238G 66% /media/IBOO
/dev/sdb1 7.5G 96K 7.5G 1% /media/XACTI
(reverse-i-search)`dd': sudo dd if=/media/IBOO/RPiImages/2014-12-24-wheezy-raspbian.img of=/dev/sda bs=4M

Next, write the v5 kodi image to the card:

pi@137 /media/IBOO/downloads $ sudo dd if=OpenELEC-RPi.arm-5.0.0.img of=/dev/sdb bs=4M
73+0 records in
73+0 records out
306184192 bytes (306 MB) copied, 34.7344 s, 8.8 MB/s
pi@137 /media/IBOO/downloads $

As you can see, that took < a minute.

Next, replace my Raspbian SD card with the v5 Kodi & reboot. Kodi will expand that written image to the full size of the card.

Reboot with the Raspbian, or whatever OS you have, plug the card reader in again with the now expanded Kodi, & find the

.update

folder, then copy the relevant build obtained from this thread into that folder.