After putting real setup.exe all works, but speed of loading to RAM about 7 minutes(tested on real hardware) and about 10 mins in Virtual Box. So I tried to use Plop, creates /boot folder on USB pendrive and put there plpbt.img. Then edited menu.lst: title Load USB2.0 find --set-root /boot/plpbt.img map --mem /boot/plpbt.img (fd0) map --hook chainloader (fd0)+1 rootnoverify (fd0) map --floppies=1 boot When Plop graphical screen started I chosen USB, but also available: hda partition1, hdb partition1, cdrom,floppy( also below setup, about, shutdown in grey colour), then it shows installing IHCI driver and back me to grub4dos menu. Then I've chosen Loading XP RAM install - /Inst/XP_RAM.ISO And after 30 sec received error Error 21: Selected disc does not Exist Press any key to continue... i pressed and it back to grub4dos menu again. What is the reason, wrong disk? If I not use Plop, setup starts, but as I mentioned need wait ~7 minutes.