Hi steve,
Thanks for the feedback. I wonder that nobody brought that up til now.
Not much time currently, but let me try answer the point quickly.
1) Yes, in default WinPE the file filter of dialogs does not work, caused by some missing dll files.
2) I will add all extensions to the tool tip in next version.
3) Yes, the system context menu invokes explorer.exe to mount the ISO. This will not work in WinPE.
4) Yes, the right button click doesn't make much sense. I will add the iso mount to the normal left click option.
Also Imdisk integration is an good idea, certainly better than the WinNTSetup_iso.cmd.
5) Yes, Tooltips should use system default show time, but they don't do this currently.