These models are provided by other PSIM users, and are used on the as-is basis.
Some of the models are in the form of a subcircuit. To load a subcircuit model into PSIM, in PSIM, go to the Subcircuit menu, and select Load Subcircuit in load the file.
Please note that these models will only work with the PSIM Professional or Standard version, not with the demo version. Also some files are password protected and the model details are not available, but you may still use them in a simulation (the password is not required to use in a simulation).
You are welcome to submit your models to share with fellow PSIM users.