This video covers how to get the Alt deselect to work with 3ds Max 2013 while using the Maya interaction mode with Maya style selection turned off.
SharpKeys - http://www.randyrants.com/2011/12/sha...
AutoHotKey - http://www.autohotkey.com/
Script used in video
*F15::
Send {Ctrl Down}{Alt Down}
return
*F15 up::
Send {Ctrl Up}{Alt Up}
return