I tried to get a 2nd USB Host with WEC2013 on a PCOMA5. I used this commands (ndcucfg):
Reg open \Drivers\BuiltIn\usbfn
Reg set value Flags dword 4
Reg open \Drivers\BuiltIn\usb0
Reg del value Flags
After a reboot I had a bootloop on my PCOMA5 (V2).
Doing the same on WinCE6 works fine.
I used the newest WEC2013 kernel (XIPVYB_C8E_V2.9_180404.bin) and an older one - same result.
I also compared the USB registry settings on WinCE6 and WEC2013 - they look to be the same.