?...hnmmmm

<playercorefactory>
 <players>
   <player name="MPC-HC" type="ExternalPlayer" audio="true" video="true">
     <filename>C:\mpchc\mpc-hc.exe</filename>
     <args>"{1}" /fullscreen /close</args>
     <hidexbmc>true</hidexbmc>
     <hideconsole>true</hideconsole>
     <warpcursor>none</warpcursor>
   </player>
 </players>
 <rules action="prepend">
   <rule filetypes="mkv|avi|mp4|mpg|mpeg|mov|hdmov|flv|vob" player="MPC-HC"/>
 </rules>