Okay I made a little tutorial so you don't have the same problems as I did.
In regards to Maya 2012 to export to Crysis you need to add a shelf to Maya which contains the export tools. It’s quite straight forward once you have broken down what the techs at Crytek are trying to say -
http://sdk.crydev.net/display/SDKDOC3/I ... aya+Plugin
You can download Crysis 3 SDK here.
http://mycryengine.com/
Once you have installed Crysis SDK 3 you are given the “.mel scripts and icons for the shelf” You can find them here - C

CryENGINE3\Tools\melscript and copy them to
C

Users\"YOUR COMPUTER NAME"\Documents\maya\2012-x64\prefs\shelves
and add the icons to
C

Users\"YOUR COMPUTER NAME"\Documents\maya\2012-x64\prefs\icons
Inside C

CryENGINE3\Tools there is a SettingsMgr.exe double click it and change the directory to point to C

CryENGINE3
One last thing to do inside C

Users\"YOUR COMPUTER NAME"\Documents\maya\2012-x64 you need to change the “Maya.env” right click on it and open it in Word Pad and change the settings to the following
MAYA_PLUG_IN_PATH=C

CryENGINE3\Game\Levels\Test_L evel\Tools\
MAYA_SCRIPT_PATH=C

CryENGINE3\Game\Levels\Test_Le vel\Tools\melScript
Now it should all work but you may need to open the plugin in Maya but they should work automatically (Maya-Windows, Settings and Preferences, Plugin Manager)
This is a thread to show you how to install the exporter
http://sdk.crydev.net/display/SDKDOC3/I ... aya+Plugin
And here is a video to show you how to do it as well,
Once all the above is installed there is a very nice plugin that makes the export process a lot easier, it’s a self install .exe you can find it here -
newspage.php?news=71279
Basicaly I double clicked the .exe and then in Maya I type the following script in to Maya embedded language “Mel” and click and drag it to the Crysis shelf.
source mayaCE3.mel;
mayaCE3;
Best Wishes and I hope this helps, I hope Crytek make Autodesk FBX support as that's all I use now for UDK so you don't have to go through any of the above.
Neil