My Windows edition has no "secpol.msc". How can I edit security policies? [duplicate]

It seems that some Windows editions don't include the GUI secpol.msc tool.
I would like to change some data at Local Security Policy, like, for example, Create a token object.
How can I do that?
All I have found until now is the secedit command-line tool, but it allows only export/import of a complete tree, not changing specific parameters.
Command-line method prefered, please, but GUI allowed too.

Try: gpedit.msc: under Computer Configuration --> Windows Configuration --> Security policies.
By default it's only installed on Windows 7 Professional, Enterprise and Ultimate editions. But you can follow this tutorial to install it on other version.