since this is not possible (also not with the "in_VID4WA.dll" winamp plugin),
Here is how i did it:
i can open a mov file from within MM, it opens the mov file in MPC
you need media player classic installed (or any other player that can play mov files ofcourse)
http://www.divx-digest.com/software/med ... assic.html
i have quicktimealternative and realtimealternative installed, and they work with MPC, i guess it's all the same. I haven't this thing installed
(maybe qt alternative comes with some plugins, in that case you should install those plugins or just qtalternative, but i think it will work like this, (check if you can play mov movies with MPC after you installed it, and leave a comment somewhere over here if you tried it)
trixmoto's script to add a video node (useful)
http://www.mediamonkey.com/forum/viewtopic.php?t=6397
the in_qt.dll winamp 'plugin' (needed to add mov files to MM)
http://nunzioweb.com/sawgstuff/wa/in_qt.dll
the "Open tracks in another application" script by Jiri and Michael
http://www.mediamonkey.com/scripts.htm, but there is a better one (this is not yet updated). I use the thing in the last post over here:
http://www.mediamonkey.com/forum/viewtopic.php?t=469
Let's Do It:
install MPC (or any other mov player )
add the in_qt.dll file to the MM plugins folder
install trixmoto's VideoNode script (to scripts\auto) 
and change it by adding MOV, now mov files are displayed in the library as well.
Next install the "Open tracks in another application" script (to scripts\auto) 
and now edit it: change the winamp.exe thing to your MPC.exe thing.(the entire path must be correct)
That's all
, now watch mov files and tag them with MMTIPSHow to watch ??: right click > send to > here is something called open in winamp (but it will open in the player you have set the path for), you can also change what is displayed here (it's easy, just run through the script)
**you can set MPC as 'always on top' (view)
**and remove everything except for the moviescreen (view)
FLAWS
**you can't add it to MM playlists or control it with MM (except sound a bit)
BUT
**when activated (or on right click), you can easily control with the mouse or the keyboard.
**MPC has playlists build in (view>playlists and then you can add stuff to a playlist), you can even play normal songs between the movies (in MPC then ofcourse)
**you can tag your mov files now!
This is the best solution i could find
, if anyone knows something better, tell! Thanks for all the scripts and the help (trixmoto,Jiri,Michael,...) .
