Found some useful stuff in Macrium Reflect some of you may like to know about.
If you create a WinPE boot.wim using their program, then navigate to \program files\macrium, you will find two utilities - PEexplorer.exe (as it suggests - a barebones file browser), and taskbar.exe (a third-party taskbar, of which seemingly none others exist).
What's good about these files is that they seem to have zero dependencies that aren't already in the base WinPE10 media.
The only issue is that taskbar.exe sometimes puts a small gap between the window and the taskbar and it has proprietary buttons (but you can remove these in reshacker if desired).
I'd upload them here but unsure where it stands with regards to EULAs - taskbar.exe seems to have been written in the 90s and there is no other information about them on the internet anywhere.
Edited by spleenharvester, 10 July 2016 - 08:40 PM.