because restoring to dissimilar hardware is not something I would recommend.
I am not sure why the Q drive keeps unmounting, does that happen for you in both PE in RAM and OS in RAM? I think i remember reading somewhere that Paragon tries to eject to boot media to avoid backing it up accidentally which might be why it keeps ejecting your ISO. Pretty sure there was a launch flag for the Paragon exe that stopped that from happening. Don't quite me on it since it was Paragon 2010 last i tried this but perhaps something like "start paragon.exe /noeject" or "/donteject". You could probably find it by running launcher.exe /? or see if it is in the Paragon User guide or reference manuals.
HDM14 comes with the possibility of creating a Win8.1 PE iso, so it should be possible to add it to our own PESE. This is where I would like you to help. My own abilities only reach as far as this: (1) Download the iso (I have a link for you if you're interested)
I would like to create an HDM plugin as well and am very new to Win7pe. Any chance I could get the script or some more detail in how to build it from the ISO?