so i will make my drive EFI ready and BEFORE i reboot ill copy the kext to my HDD? can you tell me the Commands for it too? and which chmod/chown?

you can do this steps after reboot don´t worry your applesmbios works too.

If you can boot into leo then go to /system/library/extensions and replace (drag & drop) the old aplesmbios for the new one, open a terminal and type

sudo -s
(your password)

cd /system/library/extensions

chmod -R 755 * && chown -R root:wheel *

cd ..

rm extensions.mkext

kextcache -a i386 -e

reboot