I tried various stuff but none of them worked. Like RuFus, ISO2USB. RMprepusb tells me in the description that for Windows XP installation I also need to modify some files so it can't directly make it to boot. Any ideas what those files are?
WinToFlashLite on the other hand ( I tried it on Windows 10 ) fails in the process telling me that it can't lock my usb flash device (I tried closing all running programs and even un-mounting the usb but without result).
I also tried following the command suggested in this question but without luck too.
Another thing I did was simply copying over the ISO data over my USB in the chance that somehow my PC-BIOS will be able to boot it up (using linux 'dd' command).
I'm really giving it up right now. I also always wondered why there isn't some unified way of booting El Torito ISO images without burning them to disks (but maybe I'll make another question about that)?
11 Answer
I was able to solve my problem using this tool. I simply followed the instructions on the site and copied over my Win Xp X64 ISO file into the Windows Xp Installation folder on the prepared usb.
This tool simply loaded the iso image into system RAM and executed it.
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