1) use this tool http://www.android-mediaplayer.de/index.php/Thread/3406-Tool-Mount-Media-Center-ShortCut-LAN-share-folder-SMB-SAMBA-into-SDCARD-folder/
2 ab 3) HiMediaVideoPlayer and (Himedia) VideoCenters are the same app.
Himedia VideoCenters is only a file browser.
4) i don't think MXplayer use expressx engine , not use media codec.