The command aliases can be edited in the Customize Dialog, in the "Command Aliases" and "Shell Commands" tabs.
Another way to customize command aliases, is to edit or overwrite the default.pgp file. The REINIT command reloads the aliases from this file.
MENULOAD command does not support ICA files nor PGP files.
Just like in AutoCAD, the MENULOAD and MENU commands only accept CUI and MNU files, no ICA or PGP files.