thumbnail with m2ts

[spacebug]

Hi,

When I import video from my Panasonic DMC_FT4 with the dedicated program PhotoFunStudio, it generate four files per stream, with the same name but different extensions :
* Ymd(HMS).cont => managment
* Ymd(HMS).m2ts => video stream
* Ymd(HMS).pmpd => ???
* Ymd(HMS).tmb => thumbnail


I managed to link the three companion files to the video stream by adding the three following lines in xnview.ini, in section [File] :
CopyCompanionFile=1
Companion_00=m2ts:cont
Companion_01=m2ts:tmb
Companion_02=m2ts:pmpd

By the way, when I copy or move the m2ts file, the three other companion files files are copied / moved.
I hide the three companion files by adding "CONT TMB PMPD" in the second Custom files field of File List.


Now I search a way to indicate that tmb file is the thumbnail of the m2ts file.
Is it possible with a UI-less variable in xnview.ini ?

Best regards.