There is no option to burn as ISO, whether the file is an archive, or if it has been extracted? Sorry about this, what should I do?

Look you need to unpack rar.


http://fotkica.com/thumbs3/1_tmb_692165057_2013-11-13_085757.jpg

To burn the flash drive you need a this tool USBFlashTools

http://www.speedyshare.com/5AT98/14288-2082121147-USBFlashTools210.zip

Just follow the instructions to pictures

format flash drive in FAT


http://fotkica.com/thumbs3/1_tmb_153814497_1.jpg.jpg

Unpack and run USBFlashTools.exe


http://fotkica.com/thumbs3/1_tmb_92288707_2.jpg.jpg

Choose floppy_1.44.00.img and your USB drive and click Restore


http://fotkica.com/thumbs3/1_tmb_53243488_3.jpg.jpg

Restart PC and select boot from a USB drive.