There's an example here: Start Menu button
The command can be given a list of folder paths (or folder aliases) to turn into a menu. In that example it uses two aliases, /start and /commonstartmenu but you can use whichever paths you want.
If the paths contain spaces, put quotes around the whole list, like this:
Go PATH "C:\Folder 1|C:\Folder 2" FOLDERCONTENT=nomenusel