MagicAndre1981 ty very much for your answer and sorry, I tried to found topic by keyword "wim" and found nothing, so I created this. Also, idk why, but when I'm burning images with 1.2RC, my DVD's won't boot. When creating ISO, the "Boot sector" option is "Default" and can't be changed (it's grey) and when I'm trying to reboot, there is no "Pres any key..." text apears, PC trying CD's, then going to boot from HDD. The first boot device in BIOS is CD-ROM, also I have 2 DVD-RAM (Asus DRW-1608P3S IDE 1.24 and Asus DRW-1814BLT 1.13 SATAII), I tried to burn disc on both of them and it wasn't bootable. Previously, when I used 1.6.6 to build an images, all worked correctly.