I agree, this is poorly documented. In fact, the Microsoft msdn page that describes the switches do not even list the -h switch.
Last updated 4/29/09
http://technet.microsoft.com/en-us/s.../bb897553.aspx
The only way to know the switch exists is by asking PSExec its usage directly. In fact this was added in version 1.98 of PSExec. Users should make sure they are using a version that has this capability by asking it for the usage.
The workaround would be to use a the same run program action but to manually generate the command line yourself without using the remote tab. This is fine however you must know that if a password is required, it will not be encrypted. I have recently contacted support and they state this feature will be added in the next release. (currently using 7.7a)