First of all, I'm not an expert when it comes to what ReactOS supports in terms of real hardware.
I believe (someone will correct me if I'm wrong), that ReactOS is not currently able to boot from USB, and in fact, will fail to boot at all if an incompatible USB controller (which is most of them, I think?) is present. Burning a CD-ROM with the setup or livecd images, and possibly disabling the USB controllers from your bios config, may give you better results.
I'm assuming that your intention is to try ReactOS in real hardware, otherwise it would be better advised to just use VMware, VirtualBox, or QEMU, as those work mostly out of the box.
Ideally, your real-hardware testing platform should have a serial port, and this serial port should be connected to another computer with a serial port, by using a null-modem cable. This way you could see debug messages through the serial port, and interact with the remote debugger driver when (more than if) it crashes.