I can't help noticing the RemoteIE VM uses a later build of Threshold Server than is publicly available (public build is 9841.fbl_release, this uses 9860.winmain).
I guess there's no chance MS will release the ISO of said build though, especially because this build includes the usual private-build watermarks first introduced in Windows 8.
RemoteIE uses 9860.winmain (as in, it's 9860 from the mainline branch, rather than 9860 from the fbl_release branch). And naturally, it's server -- 9860 server isn't public at all.
I guess there's no chance MS will release the ISO of said build though, especially because this build includes the usual private-build watermarks first introduced in Windows 8.