That's not a save, it's an ips file, intended to patch another file, read the nfo:
Ok, at the time this is being written, the only way to install the is to extract the files from the ISO and patch the default.xbe with your favorite IPS patcher (one is included with this release). Then you can play from the HD or from a DVD if you burn the game again.
You should look for a trainer pack. Look for XBMC t3ch FAT - just pull out the winamp visualizations and trainer pack, everything else is obsolete.