Things have gotten rather fragmented and unclear since the BartPE days. Here’s one:
Windows Boot CD Builder (PE Builder)
article #818, updated 665 days ago
WinToUSB -- Windows on a USB drive, like a LiveCD
article #687, updated 1063 days ago
Reported to work best with Windows 8.
Boot Linux from USB
article #321, updated 2078 days ago
runs on Windows, Linux, and Mac, and it will prepare a USB stick to boot and run several different distributions of Linux.
Widnows 7 liveCD project
article #288, updated 2155 days ago
Looks like a good one here: