This will create an alias pointing to each selected folder, prompting you for the name of each alias:
Favorites ALIAS=set NAME="{dlgstringS|Create New Alias:|{file|noext}}" PATH {filepath}
This covers most things: How to use buttons and scripts from this forum
If you want something on the right-click menus for folders, that guide doesn't go into that, but you can do it via Settings > File Types > All Folders > Context Menu, using the same command (above) as you'd use on a toolbar button.