WinRAR seems to do the job perfectly except for one error (see below). I originally untar'ed receiver.arf on a linux box and WinSCP'ed the files back over.

Looking at it again, I see that there's a symlink ../tftpboot/default/dev/core that points to /proc/kcore (this is where the WinRAR error occurs). That's /proc off the Linux root not the proc directory under tftpboot which is empty. I made a copy of /proc/kcore as ../tftpboot/default/dev/core and it works fine but I was just wondering what riot is using this file for since it is 270MB?

I'd like to post a zip of riot for RioBoot users but having to include this file would make it too big.

Cheers
Dave