neatx is a replacement for freenx (both implement the login protocol to start the nxclient<->nxserver communication). Neither of them is needed for snx, which uses plain ssh and scripting to accomplish the same.
$ snx -d andrewx192@172.24.92.1 startxfce4 snx: xbindkeys is already running Connecting to andrewx192@172.24.92.1... Server says: Server says: NXAGENT - Version 3.5.0 Server says: Server says: Copyright (C) 2001, 2011 NoMachine. Server says: See http://www.nomachine.com/ for more information. Server says: Server says: Info: Agent running with pid '25430'. sh: [[: not found sh: [[: not found sh: [[: not found sh: [[: not found sh: [[: not found sh: [[: not found sh: [[: not found Server says: Session: Starting session at 'Sun Aug 21 10:59:05 2011'. Server says: Info: Proxy running in server mode with pid '25430'. Server says: Info: Waiting for connection from '127.0.0.1' on port '5011'. sh: [[: not found sh: [[: not found sh: [[: not found Client says: Client says: NXPROXY - Version 3.4.0 Client says: Client says: Copyright (C) 2001, 2007 NoMachine. Client says: See http://www.nomachine.com/ for more information. Client says: Client says: Info: Proxy running in client mode with pid '9401'. Client says: Session: Starting session at 'Sun Aug 21 10:59:50 2011'. Client says: Info: Connecting to remote host 'localhost:5011'. Client says: Info: Connection to remote proxy 'localhost:5011' established. sh: [[: not found sh: [[: not found Client says: Warning: Connected to remote version 3.5.0 with local version 3.4.0. Client says: Warning: Consider checking http://www.nomachine.com/ for updates. Client says: Info: Connection with remote proxy completed. sh: [[: not found sh: [[: not found sh: [[: not found sh: [[: not found sh: [[: not found sh: [[: not found sh: [[: not found sh: [[: not found sh: [[: not found Client says: Info: No proxy cookie was provided for authentication. Client says: Info: Forwarding the real X authorization cookie. Client says: Info: Using MODEM link parameters 256/24/1/0. Client says: Info: Using cache parameters 4/4096KB/8192KB/8192KB. Client says: Info: Using pack method 'adaptive-3' with session ''. Client says: Info: Using ZLIB data compression 1/1/32. Client says: Info: Using ZLIB stream compression 9/9. Client says: Info: No suitable cache file found. Client says: Info: Forwarding X11 connections to display ':0.0'. Client says: Session: Session started at 'Sun Aug 21 10:59:51 2011'. sh: [[: not found sh: [[: not found sh: [[: not found sh: [[: not found sh: [[: not found sh: [[: not found sh: [[: not found sh: [[: not found Client says: Info: Established X server connection. Client says: Info: Using shared memory parameters 1/2048K. sh: [[: not found